#geometry-and-trigonometry
1 messages · Page 91 of 1
Tioo
What is the proof of this?
det A det B = det AB applied repeatedly
You could let B = A here
Anyone know how to solve this pls?
Nvm
so i m in 10th grade and i suck in geometry any tips pls?
step 0 of any geometry problem is to draw a diagram. without a diagram, you will get nowhere.
Ok thanks
analyze the question, draw the diagram, write what is given which will help you lay out whatever you have and help you figure out what method to use for solving the question, and then write what is to be proven. It seems little but really improves how you understand the question.
Hi guys
how i find the alpha on the question a) and c)?
set up a linear equation and then use algebra
for part a, the sum of the angles equals 90
solve for x then alpha = x + 40
ignore alpha and treat it like a var
for part c, you must have x + y = 2x - y (vertically opposite)
its prob just to throw you off
you also must have x + y + 4x - 2y = 180, or 4x - 2y + 2x - y = 180
use either one
no the question is to find alpha
yeah
treat alpha as y or any other variable
idk why the person writing the question felt the need to use alpha
2x-10 + x + 40 =90
solve for x
then you can get alpha
Why is the formula of a circle x^2 + y^2 = r^2? ik it has something to do with the pythagoream theorem but when i visualize something like this equation i think of
like i cannot visualize how the pythagorean theorem forms a circle
there's a step between these
do you know how to find the distance between two points on the xy plane?
yes by using pythagorean theorem
right
$x^2 + y^2 = r^2$ says that the distance between the points $(x,y)$ and $(0,0)$ is $r$
Ann
why does it go all around tho
the circle is the set of all points of a distance r (that distance being the radius) from the center. they can be that far away in any direction
also wdym by between (x,y) and (0,0) i thought x and y is basically 0 until you shift them around like (x + 3)^2 + (y+3)^2
like the center of the circle
no, (x,y) is a point on the curve
all cartesian equations are conditions placed upon an arbitrary point (x,y) on the plane
i think i need a 3blue1brown vid 4 this 😭 🙏
i get the equation but how it works i dont get
the equation for a circle centered at the origin is
[ x^2 + y^2 = r^2 ]
where $r$ is the radius.
\begin{itemize}
\item The set of all points $(x,y)$ satisfying this equation is the circle.
\item $\sqrt{x^2 + y^2}$ is the distance from the origin $(0,0)$ to the arbitrary point $(x,y)$ according to the pythagorean theorem.
\item Therefore, the set of points $(x,y)$ satisfying this equation is exactly the points which are a distance $r$ from the origin.
\item if you drew a straight line from the center (origin) to any point on the circle, its length would be the distance between them. this line segment is called a radius of the circle.
\end{itemize}
cloud
so r is the radius of the circle
hmm maybe its the (x, y) thing thats making me confused on how to visualize it
i get what ur saying on how (x,y) satisfies the equation but should i think of it as a function or something else
if you were to pick any point on the circle then its coordinates would satisfy the equation
like -√(x^2 - r^2) = y or something
as well, any point which is not on the circle would have its coordinates fail the equation
so the circle is just the set of points whose coordinates make the equation true
im starting to piece things together
but its still kinda hard to like visualize it intuitively
but i get what ur saying 🙏
its just that this is what i see when i try to imagine the equation
,tikz
\draw (0,0) nodecirc{} node[above right]{$(0,0)$} -- node[midway, below right]{$r$} (235:2) nodecirc{} node[below left]{$(x,y)$};
\draw[dashed] (O) -- node[midway, above]{$x$} (O -| P) coordinate(X) -- node[midway, left]{$y$} (P);
\draw (O) circle[radius = 2];
\path pic[draw, angle radius = 5]{right angle=P--X--O};
cloud
Can somebody give me the statements aligned with the reasoning
is this khan academy
no
show the statement list
r u sure this is the right list i dont see any xyzs on the quadrilateral
The xyzs are just variables to fill in the actual variables (BADCE)
im gonna ignore variables 4 now
so you know that BA and CD are equal right
and
AD and BC is the also equal
what triangles can u make with that so AC and BD can bisect each other
yes the given information is htat BA and CD are congruent
it already shows AD and BC are congruent
the only triangles i can make so AC and BD bisect is
⃤ BDC and. ⃤ . DBA ?
ok so our apporach is to prove BD bisects CA with triangles
and BDC and DBA cant prove that since itll only include BD
and also what other triangle can we make here
we can also do
do u know where im going with this?
@hazy hare
wait maybe i approached it wrong
oh
ok i thought it through
so we want to make 4 congruent trianges
ABC = CDA
and
ABD = BCD
and we know that these triangles r congruent to each other due to SSS, they share a side with each other and they have 2 other corresponding sides
and now we want to prove that BE = ED and CE = AE with these triangles
so the first step would be to make <CEB and <AED congruent since theyre vertical angles
and we know BA is pararell with CD and BC is pararell with AD because their triangles share the same angle so we can use interior angles
so with this we know that they are pararell, and angle CAD and ACB are congruent because of alternate interior angles
and because they share all angles and a side, by AAS congruence they are the same triangles, so therefore BD bisects CA
since theyre the same triangles and corresponding sides share the same length
sorry if my explaination was kinda bad but i hope it gives u some insight
so basically whenever a question asks u to prove BD and AC (or anything like that) bisects inside a parellelogram just create congruent triangles, and try to make BCE and AED (or anything like that) or you could even find CED or BEA congruent
it proves that they bisect each other because well if you have congruent triangles, they have the same side lengths right? so if you have 2 of them then the definition of bisect is divide into 2 equally, and since they have the same side length then it proves that they bisect
@hazy hare
also u should ask in the help channels next time instead of here since its way faster
Who created maths my head is aching me from just a maths question!
do you want to complain about it or do you want to solve it?
Excuse me why detA det B=detAB?
The determinant measures how much volumes change during a transformation.
Help fund future projects: https://www.patreon.com/3blue1brown
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Home page: https://www.3blue1brown.com/
Full series: http://3b1b.co/eola
Future series like this are funded by the community, throug...
the determinant is the area/(hyper)volume scale factor
A simple explanation for the determinant formula starting from the concept of area.
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Timestamps
00:00 Introduction
00:17 Act I: Flatland
06:36 Act II: Going to the 3D
11:06 Act III: Can we get much higher?
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Note on technical details
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yo does anyone know any good geometry vids to watch on youtube
i try to look but cant find any on the topic i am being tested on tommorrow
the goat
How to dtetermine the value of a(strech) in the vertex form of parabolas by looking at its graph? Y= a(X-h)^(2)+k
what data do you have access to? another point on the parabola, perhaps?
I know, we can use That as refrence, but how do i create a refrence point on the graph which will change reative to a
Please show the original problem, exactly as it was stated to you, with the entire original context. A picture or screenshot is best. If the original problem is not in English, then post it anyway! The additional context might still be helpful. Do your best to provide a translation.
Nvm, let it be
Thanks
what don't you understand?
What ever this thing is
do you know your parallel line theorems?
I think so but like this is a new looking one to me like what is point a looking at?
Like I don’t understand what I do to get the answers
they're looking for that angle
start with what's given and start doing some angle chasing and see where that leads you
see if you can get any new info from the position of that 62° angle
@silent plank there either gonna be corresponding or alternate exterior right
you can do many things with that 62°
you can do them all if you want
it won't hurt to get more info, even if some might not be needed
So like vaule of X is 16 cause 80/5 is 16 and cause there vertical there equal
yes
y isn't 62
alternate exterior is applicable here,
but that angle at the bottom isn't y
I am confused then
why do you think just y is 62
tell me which angle the 62° is alternate exterior to
don't overthink
Erm
it looks like you tried to apply it, you just weren't careful
2y?
as for A, don't forget
angle sum on a line / linear pair
What does that mean
its a common geometric property
one you should know and have encountered before being introduced to parallel lines
how big is that red angle
Linear pair they =180
yes
Ty
You guys are funny
<@&268886789983436800> potential troll?
Please avoid posting huge emojis that take up tons of screen space
For mobile users it makes the channel hard to use.
If the definition of a straight line segment is the shortest path from a point to another,
then is there any way to rigorously prove that there's no other distinct straight line segment which connect exact those 2 points?
(By the way, i don't care what kind of method or definition you wanna use, as long as it works 😄)
trigonometry is scary
are the 2 lines that don't cross each other parallel?
if not i am cooked.
I'm not sure if this is the right place to ask but how do I find out lenght of 2 if 1 is 1425?
i know i learnt abt this somewhere
but i forgor
a^2+b^2=c^2
ur prolly gonna need that
pythagoreans theorem
well thank u for the answer but I still got no idea how to solve it
where does it say they are parallel
Guys can you help me understand this please I am Cooked on this test if I don’t know this
understand what

In this video we will look previous years trigonometric questions asked in boards.
It will give better insight of how questions come from this chapter in 10th class final boards examination.
How to solve Probability questions ✍️🤔
#class10
#trignometry
#youtube
#youtuber
#subscribe
#class10
#guess
#boards
#boardexam
#trignomentry
#trigno...
try working out some angles
and then?
a little bit of trig
i’m guessing the assumption is that this is a regular polygon?
if so, you can find the side length from law of cosines with 1
then u can find 2 from the definition of a regular polygon
(it can be inscribed inside a circle)
assuming line 2 is perpendicular to line 1 (basically its 90 degrees where they intersect)
so join one end of line one to the end of line 2 as ive given here.
in pythagoras theorem
AC^2 + BC^2 = AB^2
dm me if you need more help
this is wrong
this length is AC - something
pythagoras cannot be used straight away
you can derive the actual needed equation witht he given info
if BC is 1425
but wait one more important thing you can only use pythagoras is 2 values are given
i guess you cant use it here as only 1425 is given, mb
but if 2 values are given and you wanna find 2,
then AC^2 = AB^2 - BC^2 (if AB is given)
Can anybody help me understand this?
Idk if I got any of these answers correctly
,rccw
wow that is a LOT of angles they're asking you
An.| Correct?
---+---------
7 | Yes
8 | Yes
10 | No
11 | Yes
14 | Yes
15 | Yes
16 | Yes
17 | Yes
18 | Yes
19 | Yes
20 | Yes
21 | Yes
22 | No
24 | No
25 | Yes
29 | Yes
32 | Yes
35 | Yes
36 | Yes
37 | Yes
41 | No
44 | Yes
45 | Yes
@sudden solstice
What is this?
all those angles 4 what 💔 its just time consuming
a table telling you which ones you got right and wrong
NO NO NO
I REMEMBER THIS
no
i remember it being hard
no
i saw some friends doing it
and decided not to do it
just use calc
it gets messy but it isn’t that bad
I have seen this question before yeah
im struggling to remember how identities interact with one another
i understnad now why quoitent identity worked for this
but at the time i could not see it is there like any way for me to be able to recognize these i dentites better?
-cot(t) wasn't distributed properly
and none of those options seem appropriate for the last part
thats pearson for you
making things more complicated then it should be
(I really shouldve taken in person classes for this)
wait, misread the expression
i suppose its technically ok, misread cot for cos
but for the last one, it should be a combination of quotient and double identity
wdym?
quotient identity by itself would only lead you to
= -cot(t) + 2sin(t)cos(t)
which isn't quite the final result
but wait
oh wait nvm
continue
no wait
yeah wait a minute
thats the exact reason why i got confused on why quoitent idenity would work for this
don't worry about their options
and first focus on what you'd normally do
i see now
but everytime i try to solve it at the time i cant see the options
i have trouble trying ot piece what the next step should be to get it to the result I want
like just a bit before
what did you try for 4?
This is pretty obvious
Since angle of depression is 5°
The angle of elevation would be 85°
Is it not?
no
Why not
by definition / alternate angles on parallel lines
angles of depression and elevation are congruent
Wdym
Yes
they'll be the same size
You mean, angle of elevation would be 5°?
yes
Well
Oh yeah
Sorry dude
Lol
I always mistake angle of depression as the third angle
Tan=26/80
Tan= 0.325
Tan-¹(0.325
=18.00
Or was it
(26)Tan80°
=297.18
I saw these solutions on yt I'm not sure which is true or am I even doing it right
Why divide 26 by 80
???
how do i solve this
what did you do to get there?
i forgot how to do these and would like some help if possible
search up similar triangles
by angles in parallel lines, angle QRP = angle STP
angle RQP = angle TSP as well
hence you have angle-angle similarity, between triangles QRP and STP
can you now set up an equation about the side lengths ratios of both triangles?
Idk, what about the other one?
well firstly, you shouldn't be using 85 deg but 5 deg
try drawing the setup out
you should then have the opposite side to the 5 deg angle = 26 m
and the adjacent side to the 5 deg angle you don't know, so we'll call that x
and yes, tan theta = opposite/adjacent is the right trig ratio to use
if you change 80 to 85, one of the methods you wrote is indeed correct
you need to think through this yourself and figure out how to get to the correct answer, not just what the answer is
Yep that's what I need
yep, then continue from here
qs/ps = pr/pt
x/15 = 62,5/25
62,5/25= 2,5
x/15=2.5
x=2.5*15=37,5
this is what i get but x is supposed to be 22,5
you're not being consistent, that's why
eh?
QS and SP correspond to RT and TP
sorry to bother but could anyone help to check some of my answers for a trigonometry worksheet (6 questions, the absolute basics)
honestly just go to the help channels
!help
To ask for mathematics help on this server, please open your own help channel or help thread. See #❓how-to-get-help for instructions.
and you can ask your question directly
if you have QS/PS, then PR/PT is not correct
yeah i noticed what i did wrong
ty
no worries!
have a blessed day mate
Found the magnitude of oa,ab, and ob and then cosine rule to find aob and then 0.5 x sides c sin (the angle)
but the thing is when there’s |a|=|b|=1 given
Aren’t we supposed to use that only if the vector is in terms of only a and b and not both
That’s just what I wanna understand
Guys I need help my teacher told me to do this and I don’t know how 😭
And I think I got some answers wrong
did you even see this
Idk what that means
Like that long message he posted
@solid needle
Wdym by that
*she posted, not he
Oops
Like how do I find them out is what I am aksibg
Asking*
Not to just give me the answers
And tell which ones are wrong
your initial request implied you wanted to know which ones you got correct
assuming you used valid methods to obtain those, that cuts the list of stuff you need assistance on
57 is a lot to go through one by one
state specific ones you want to focus on
Deepseek, I gave it the question but I didn't understand the solution
It's C
Here's a better picture
Sorry for the poor quality pictures, my phones front camera is broken
Yes
This is my type of channel.
So a and b's values ?
I have to hop off rq, you can ping me the explanation if you solve it
Apparently they’re teaching us probabilities in geometry now (I’m not sure if they’re supposed to)
I’m not sure how to calculate number four where it says “Tara has 10 pennies, 4 nickels and 6 dimes in her purse. If she were to grab two coins, P(total of at least 15 cents)?”
My teacher told me to make a table to solve it but I really got stumped there
here’s my idea. If she every chooses a penny she can’t get to 15, so she has to take a dime and a nickel or 2 dimes. Add up those probabilities and divide by number if possible 2 coin pairs and you got your answer
the table i’m guessing is doing the same thing but drawn out
May somebody help me know how to do the 5th one?
I was confused on how to do the figure and most probably solving it..
Can't one of the sides be given by solving for:
4x + 2y = 400
xy = 400?
it is giving me an imperfect square which is making me think that it is a wrong approach
Yeah
nah it seems correct
Help me understand this
,rccw
@sudden solstice have you made any changes on this since i wrote down that table detailing what you got right and wrong?
So it will indeed give square root of 147200
I only need someone to tell me how to do it not what I get right and wrong
apply various properties of angles formed by intersecting lines, or by angles formed when two parallel lines are intersected by a third.
I still don’t understand
I'd try finding the right angles first
That question can be solved through the notions of property of angles alone
Do you still need help?
This looks fun
Like the area of a triangle formula?
Pretty cool but really impractical for what I used it for
But it works
that one triangle drug addict guy?
For what I used it for
It was not very good
But yeah it can help in other cases
I don't remember exactly but I remember it involved trig and could be solved a lot quicker with b*h/2
Ohh ok
Vanellope von Schmugz
I need help rearranging sectors
I haven't gotten the opportunity but I doubt they'll test us on something like that today
polynomal 🏁
how about
chat gpt solves it for us 😏
geometry did not teach me that 🙏🙏
seems like just simplifying it
foil 🗿
ok
foil the left expression to
2(cos yx)
make sure to use inspection method on ur exam if theres any systems 👍🏻
Vanellope von Schmugz
ok then
foil left to
erm
😭
dawg
honors algebra 2 w/ trig
is my level
THAT
is not
i know what all the funny little triangle side formulas are
no idea what doa is
ok now i know
mensa brain has absorbed it
im evolving
Just came back after missing a whole chapter used ai ngl.. I need to know not sure on any of these
Alright I ended up redoing some of my answers
How do we prove the identity cos(x+y) = cosxcoy-sinxsiny without the unit circle?
there is a way to do it using nothing but right triangles actually, one moment
@signal vapor
Yes @vocal charm
Yes cause I doing know how to do anything on this page ☠️ and I think I got some wrong 😑
so like the given radius is 4cm and the central angle is 45 degress what is the area of the sector
i was wondering if my answer is correct 0.62cm squared
cuz the formula given to me by my teacher was the area of the sector - area of the triangle
did you mean you wanted area of the segment?
I might be trash, but trig proofs have been kicking my ass lmao
I think I got them, one i didnt even know how to approach because i wasnt taught the difference of cubes formula
im a lil nervous on skipping precalc so im investing hours into trig
Vanellope von Schmugz
i do have a bit of a question on an identity
SinXCosY
And
CosXSinY
Are two different identities which seems weird to me because you can move around multiplication due to the commutative property of multiplication
product to sum ID
I guess its just a context thing
I don't wanna 😫 . I wrote my last math test for the term today
and I'm writing physics tomorrow so I gotta lock in for that
yeah
It was a pretty easy test
Vanellope von Schmugz
so glad i dont have to memorize all these, im close to laminating my unit circle sheet with all my IDs written on them
Vanellope von Schmugz
I was so relieved to find out most engineering courses allow you to have formula sheets
yeah i need to look up what the functions mean physically, im visual learner so SEEING cosine (as being just a plotted value of your x coordinate) on the unit circle was super helpful
Wonder if i can do the same with the identities
Thanks
hello guys is some of you all had problems with math and how you solves them? cause I don't know why but don't matter how hard I try I'm still not good(especially with geometry...)
start with simple questions. Solve a lot of them. Slowly move on to harder ones. This will make it easier to solve tough problems. Never start with hard questions. You'll feel like quitting if you do so. Hope this helps :)
did you try to solve some questions?
well, atleast you can do it
i dont need this in life ugh
same im in year 10 as well
i gotta give igcse tests in april im gonna die
me too dawggg
What is that
matrix in 10th? That's weird
yehh its different education systems ig
UK school test but for international schools
its so hard omg
thank uuu 💙
When I search matrix in google, I get the movie lol
alright, I'll try
search matrix math lol
ik
Oh
so weird
My name is Grant Sanderson. Videos here cover a variety of topics in math, or adjacent fields like physics and CS, all with an emphasis on visualizing the core ideas. The goal is to use animation to help elucidate and motivate otherwise tricky topics, and for difficult problems to be made simple with changes in perspective.
For more information...
oh ok
didn't see this message
yeah this guy's good
Explain this to me pls
Please explain how I get the answers and not just tell me which ones I got wrong
Uhhhh
Wut du hell
Is this a joke or is this actually serious 💀 ?
u really just need to know correspondencing angles, vertical angles, that a straight line has 180°, triangles add up to 180°, opposite angles of a parallelogram are congruent, and more
you just have to use the properties such as that of corresponding angles, alternate angles, complementary angles n all
if 16 is 45, what does that tell you about 31?
you're just giving the answers away 😔
16, 31, 35, 20 are corresponding angles so they are equal
37 is vertically opposite to 35 and 34 to 31, so they're also equal
bruh u need to learn these angles and properties
No need to be rude 
uhm... sorry... I didn't mean to..🙂
Like it’s quite apparent
sorry dude...
Wait
Is this the wrong channel to send doubts?
I deleted it, I just read the rules my bad
I got confused by 'occupied'
this channel is fine, only help channels can be occupied not these
afaik
Oh I see
i have this demonstration
I have an isosceles triangle ∆ABC
CH is the height relative to AB
I have to trace the projection of H to AC and the projection of H to CB
the projection to AC is P
to CB its Q
if i project Q into AB (Q') and P into AB (P')
by construction it means that P'H = Q'H right?
Did you learn what you were wrong about?
If yes, that's it
yes but i aint the sharpest in maths
i always had a few problems with it
noo i got ghost pinged
😭
yeah because its symmetric
ofc theyre equal
idk what the so called best one in class is saying
my dude said 'how do u prove that' like twice
then said 'believe what u wanna believe'
bro..
anyone knows how to do this?
its about the area of an arch with given angle and radius
Anybody doing silly triangles
Guys,can we use the menelaus theorem for any case(provided we choose the components correctly)?
its symmetry,
theres nothing to believe
H is the median of AB , and is also a point of the height, CH,
since the rectangle is ∆ABC isosceles (given by the book) projecting H into the two long sides, AC and BC, (thus forming a 90° angle) will have the same length for both (since H is median of AB)
and if i project the two projections on the base (AB) where H is located in, (lets call them P and Q) we get P' and Q' that by symmetry are equidistant from H, thus making them congruent
its not to prove
its by construction
if you want to school me on this
tell me at least why im wrong
oh wait
youre acting like
AAAA
sorry its not even 7 am im not thinking
sorryyy
im just going off what i wrote yesterday
lol
happens often to me too
You need a formula to solve it
As seems you understand Spanish, I give you a web in Spanish: https://www.areasyvolumenes.net/area-de-un-sector-circular/
translate.
I don't know spanish but from the words here and there, it feels like they gave the radius and angle of each sector and asked the areas
It's about having to calculate the area of a circular sector having Radius and Angle
Bruh how we supposed to understand when its Spanish explain pls.
i would imagine that these:
R = 2
tan(EF) = 4/3
FB * BC = 3 sqrt(2)
calcule ("calculate") BG
are self explanatory
it's Portuguese and you can use Google Translate on the image
I don't actually know Portuguese but I can figure it out from my knowledge of Spanish
"no gráfico a seguir" = "on the | graphic | to | follow" ~ on the following diagram
"se" means if and "e" means and
also Portuguese does have "diagrama" if that helps in any way
||sine rule on the triangle formed by AE and AFB gives BF = 4/sqrt(5)||
||so I can now find AF and BC of course, what's next?||
||AG/BG = BG/BC so I know if we find AG we're good||
there's just so many damn computations
sure
I feel I'm going about this the wrong way due to it being inefficient
angle EOF is (EAF)/2 then there's a formula for sin(arctan(x)/2)
cause I have all this technology I just used WA or equivalent, but by hand it's sin^2 x = (1 - cos 2x) / 2 and now sub x = u/2 and square root both sides
so sin u = sqrt((1 - cos(u) / 2) = sqrt((1 - 3/5) / 2)
yeah I mean I knew the solution had to be a lot more elegant
ah wait that's a brilliant observation
so you can let opp = sqrt(5), hyp = 5, and hence adj = sqrt(20) = 2 sqrt(5)
so tan theta is indeed 1/2
I did not notice that yeah
yeah I figured out that the line was collinear but I didn't know how to use it
Does anyone have spare exercises relating to this lesson? This topic in our school usually entails finding the measures of the sides and angles. I have exams tomorrow and I would appreciate some exercise resources. Thank you!
there are formulas for $A \circ B$ and $B \circ A$ where $A$ = regular trig functions and $B$ = inverse trig functions
south
someone gave me this in a work as a challange. I have no clue how to calculate the side X. Basically, the length of the square is 100 meters and the width is 50 meters, the surface of the curved section down is 2500m↑2 and the length of the leg of the right triangle is 25 meters and I need to calculate the hypotenuse X. Annoying is the curve, there is no informations to the curve
please help someone 
This is the original paper
@tulip bone continued from your question: #help-3 message
my desmos graph shows that this step is wrong
https://www.desmos.com/geometry/ejctcuojx6
This type of questions is textbook exercise on the Co-side Theorem (共邊定理, a.k.a. Dovetail Theorem (燕尾定理))
https://baike.baidu.com/item/燕尾定理/10828082
hey does anyone know if it's possible to solve this, btw diagram isnt drawn to scale
what are you trying to solve for?
Can someone tutor me?
Everytime I ask ChatGPT to calculate cos(2x), it never can on the first try, lol. Anyone else notice that?
wdym by "calculate cos(2x)"?
For example, if I ask it to calculate cos(2x) given that tan(x) = -20/21, it hasn't been able to for like 5 different times I've asked it, lol
Please do not trust ChatGPT or similar AI tools for mathematical tasks, as they often generate output which "sounds correct" but has numerous factual or logical errors. Use of these AI tools to answer other people's help questions is strictly against server rules (see #rules).
I use that and Deepseek to check my work sometime, haha
Deepseek doesn't have the same issue, I thought it was interesting, lol
Not beyond a certain depth, but I'm fairly certain both of them can calculate a double angle 💀
For cos(2x), specifically
The others were fine
and let me ask you
is that a sign of a well designed calculator/assistant?
of course not
It depends on ratio between valid/invalid responses
it cannot actually do math, all it’s doing is pattern recognition “hmm what word should go next?”
if properly used wolfram will always be 100% accurate
What are we to make of AI providing the same answers a textbook would then?
why have so many grade school students so blindly embraced gpt usage 😭
Assuming the textbook is correct, then the AI would be as well
I'm not arguing that it is reliable at any depth or complexity, but for fairly standard Trig exercises (like calculating double angles), AI seems proficient
why is your first instinct to use a “tool” as unreliable at gpt
Thats probably the equivalent of asking it to calculate the integral of 1/x^2 from 2 to 5, lol. I'm willing to bet it will return the correct value
is it really too much effort to just look up the double angle formula and then plug it into wolfram or smth
Thats the thing, I'm arguing against the notion that it is unreliable across all depth
Never said that 💀
most textbook problems arent meant to be hard
like it has potentially the right approach for this but messes up badly
how can i prep for honors geometry next year
how old ru guys
6300
can someone explain to me how hyperbolas work
I don't get how to find the constant and the x,y values
do you know what $FC$ here equal to?
C
you know AF = radius F circle and BC = radius C circle right?
yeah????
OMG
ITS 7+17
OMG
YOU SAVED MY LIFE
THANK YOU SO MUCH
why dont you just use wolframalpha, seriously
if you're going to check your work, use something that we know is reliable
even if chatgpt is reliable at certain depths (which im still not convinced it is), at what point does it start to become unreliable?
why not just use something that is reliable
"hey im gonna use this tool that has a 2% chance of cutting my finger instead of this tool that has a 0% chance"
why
this generation smh
Lmaoo, I actually never used it!
I've mostly just taught myself Math all this time actually and none of my classmates ever recommended it to me before
But I just checked it out and I love what I'm seeing, definitely going to being using this while doing math from now on
ive been using this thing since i was in high school
its insane that this thing exists and students are still using chatgpt
like actually mad
good, tell your friends
Sadly, I don't have any math friends, lmao
No one in my life would gaf 😂
Its a lonely road
How reliable do you consider ChatGPT or Deepseek to be in explaining math concepts?
yo guys can someone tell what square root of squareof ....-1 is?
can you write that properly?
when you say ``square root of square of $-1$'', do you mean $\sqrt{(-1)^2}$? bc this is $\sqrt{1}$, or just $1$.
Ann
didn't read that properly
Yep all cor
*correct
yup
you just would write $\sin 3^2 = \sin 9$ btw
south
what's the best way of expressing angles? radians or degrees?
also how on earth do i memorize the unit circle
depends on context but probably radians are better
definitely don't memorize the entire thing
depends on what you're doing/whom you're communicating with
memorise the first quadrant, you can get the rest through reflections
funky ass hand
oh.
you just have small hands
I had a friend with tiny hands like yours
Diagram not drawn to scale
where are you getting that i have small hands
the watch? idk
there's no scale reference in the pic is there
the proportion just doesn't look right on your hand idk
ok we are off to #「helpers-lounge」
guys can someone teach me circular measure, im about to have a mental breakdown
- what do you mean by "circular measure"?
- are you able to calm yourself down enough to not be on the brink of mental breakdown?
guys, who can help with stereometry?
Is khan academy trigonometry good if you forgot everything
for sin and cos just remember it is always sqrt 1 2 or 3 divided by 2
then just imagining unit circle cos is the x length and it is longer with smaller angles
yep
also org chem tutor has better videos than Khan
hard to measure objectively, sure
but omg Sal Khan talks at a snail's pace
if I watch org chem tutor I know I'll see 2 fleshed out examples or more in 10 minutes and I'll actually be learning new stuff each minute
like 2x speed is not a permanent solution for a bad video
same I can't judge
I was really turned away due to a few bad impressions
fuck this is really shit compared to org chem tutor
I'm not saying he's the best, but like there's so much better out there
they're still using 10 year old videos? after so much funding??
omg
that's goated
yeah mmm at what point is that just tutoring then hmm
like connecting different topics with each other is really nice tho
and making corollaries as you said
damn, send me a link to the site
wow
do you think that Spanish speakers would want to use it
if it's really that good
just turn on auto-generated subs to understand the videos
so much maths online
oh yeah science but you don't need to do experiments to know stuff, haha
nah thanks for the offer
but Aus is a lovely enough country for me
anyone can help with the answer (want to check against someone else's)
can any tell me what eccentric means
there is a technical definition for the eccentricity of a conic section
but we are going to skip that for now
but basically it is a value that describes the shape of the conic section
for circles its 0
ellipses are between 0 and 1, where the more flat it is, the closer to 1 it is
if your eccentricity is 1 or higher, you'll get other shapes like hyperbolas or parabolas
for ellipses in particular, the eccentricity is e=c/a
c is distance from focus to center, a is semimajor axis
this definition can extend much further to generalize to all conics but you can go look that up if you want
I'm starting to learn about optics, and I saw Newton's equation for a curved mirror f^2 = x_o x_i where x denotes the horizontal distance to the focus. I recognize that for a point on the principal axis, this means its image is the circular inverse of itself with respect to the circle with diameter spanning from the center of curvature to the mirror vertex.
Is there a simple geometric proof for this fact?
Is there a similar geometric relation for points not on the principal axis (maybe for simplicity, we consider the paraxial approximation)?
I found this post related
https://physics.stackexchange.com/questions/552648/circular-inversion-and-spherical-mirrors
circle
Who can help me
@upper karma What you need help with?
give me a sec... let me look into it
Damn
hypotenuse is in front of the 90 degree angle
imagine a line going forward from the 90 degree square mark
it's the diaganol line
LN NM = leg
yeah
LM = Hypot
oh it wouldn't?
thats arithmetic mean
its stupid
geometric mean is like
u add rhe numbers up
and take the root
like
ok if u have
3 4 and 5
u go
cube root of 3+4+5
not add im dumb
multiply
cube root of 345
oh it's root n of all the number mulitplied together
yeah
is there latexer here
this was right the first time
,,\sqrt[n]{a * b * c... etc}
it made the 4 italicized instead of multiplying thats dumb
and it wasn’t D 💔
rey
rey
do you get it?
Is that not a?
Geometric mean is a triangle that has an altitude if I remember correctly
What’s the answer to this?
!noans
The purpose of this server is to help you learn, not to hand out answers. Do not ask someone to give you the answer directly.
it’s asking you how you’d manipulate triangle U so that it was a perfect overlay of triangle V
given the options you should be able to determine the answer
How do i solve this?
Take ln
what after that?
I tried it but had to use L'Hospital too many times
Hmm
is there any other easy way to do it?
ah sorry
Vanellope von Schmugz
A translation then a rotation
How to solve this?
Can you solve this innocent-looking geometry question? This appeared as the final problem of one of the Math Olympiad tests, leaving most competitors confused...
#math #maths #matholympiad #mathsolympiad
turns out this diagram has this fact
im lowkey struggling cause I forgot something
im in the middle of doing trig equations and i forgot how to turn
,,\2sqrt{3}/2
ill figure it out at some point
this
into these
i forgot how to convert from secant to something that would be in sin,cos, or tan
to get my radians
sec(t) = 1/cos(t)
yeah but i think the way i was doing it was wrong
since i switched the numerator and denominator around
show your work
2 sqrt(3) * 2 sqrt(3) isn't 4
and also you went about this rationalization in a way that i can only describe as laborious
2 sqrt(3) * 2 sqrt(3) isn't 1 either
you overthought it and forgot how arithmetic with radicals works
well i dont really have a teacher tbh
i have the material from pearson and have been using that
and sometimes i do that
yeah but can you explain to me a less labrorous way to go about it?
i see too many issues now
my brain is catching up to why this screwed me up
thank you so much
i think what messed me up was the 2*sqrt(3) being together
and then like you said i began overthiking
im gonna go to sleep now and make sure i dont do that again 😭
Beyond this you can construct vectors (1,2) and (3,1), the cosine of the angle gives 1/sqrt(2) hence 45 degrees
Alternatively tangent difference identity works with m1 = 2, m2 = 1/3
yeah a synthetic way is probably very inventive
next step: ||use similar triangles to conclude that ABC is 4 times larger than AFE and hence AC:AB = 2:1 ||
||but CD:DB = 2:1 also, so AD is an angle bisector and the result follows||
,w sqrt((2 - 1.2)^2 + (2 - 0.4)^2)
your coordinates of E are wrong: they should be (1.2, 0.4)
I think you know the idea but that minor error changes everything
yes y = x/3 after all
oh I see I didn't know you took the origin to not be at the bottom left
that makes sense, I just assumed haha
IDK anymore
<@&268886789983436800>
I just want to ask that AO2 is included in the equation ar not
working on it
not included
not included
I mean why would it be
send pls
yes
yes from the start pls
We just used pythagoras theorem
in triangle AOM and BOM to get AM^2 = BM^2
then we again used Phythagoras theorem in triangle AON to get AN^2
then I found a relation between AM and AN with the information given:- AB=2AC
then equated equation 1 and 3
and got the answer
simple
hm nice
I am cooked guys I got a 40 on my test in geometry
out of?
I suck at geometry so its okay
40%
oh
We doing this thing hold on let me find picture of it
out of 100
I got this wrong and ik I did lol cause when I put it into ai now it says this is answer
I am cooked
Are TS and VW parallel?
it was easy how did u mess up
.
yeah I assume those are the parallel arrows
If yes then AAS is correct
I mean
easy for you lol
easy for us but not htem
Yea
I was using 1% of my brain
how do I improve my observation
in circles
I can grasp whats going on in other shapes like triangles and quadrilaterals
Yea my brother is in the same class as me and he told me when he got a 57% “I am gonna run up the hallways naked” and in front of our teacher
Just apply all theorems that can be used in the question or check which theorem can be used in the question, rest is practice
Ayo
I thought angle ade is equal to abe which is true
Oh
- Understand the Basics Thoroughly
Before you can observe patterns, ensure you have a solid grasp of foundational math concepts. The better you understand the core principles, the more easily you'll spot important details or trends in problems. - Look for Patterns
Geometric Shapes: In geometry, observe how different shapes relate to each other, how angles change, or how symmetry plays a role.
Algebra: In algebra, notice how certain variables behave. Look for patterns in equations or factorization.
Functions: Observe how a function behaves, especially when graphed. Does it have symmetry? Are there any periodic patterns? - Work with Visuals
Draw Diagrams: Especially in geometry or calculus, sketching out problems can help you see things more clearly. Visualizing math can help in spotting key relationships between elements.
Graphs: Plotting equations and looking at them visually often reveals trends, slopes, or asymptotes that might be hard to spot algebraically. - Practice Mental Math
Training your brain to quickly recognize patterns in numbers or equations helps improve your ability to spot errors, shortcuts, or important relationships when solving problems. - Examine Problems from Multiple Angles
Break it down: In word problems or equations, try different methods to approach them. Sometimes a geometric approach works better than an algebraic one, or vice versa.
Try Simplifying: Simplify complex expressions or equations and see if any patterns emerge. For example, factoring quadratics or simplifying radicals might give you new insights.
yeah I didnt see the arc
- Study Solutions Carefully
When solving problems, take time to understand the steps involved. If you made a mistake, try to figure out where your observation went wrong.
Review examples and try to reverse-engineer the solution. This will help you notice strategies or techniques that can be applied to similar problems. - Look for Symmetry or Invariance
In mathematics, many problems have symmetrical or invariant properties. Whether it’s symmetry in algebraic expressions, geometric shapes, or number patterns, recognizing these can help simplify your work. - Play with Problem Variations
Try solving slightly altered versions of the same problem. For example, change the numbers in an equation or modify the geometry of a shape. This will train you to observe how small changes affect outcomes. - Use Problem-Solving Strategies
Apply various problem-solving strategies such as working backward, making substitutions, or breaking problems into smaller parts to notice how the structure of a problem evolves. - Practice Regularly
Like any skill, mathematical observation improves with practice. Consistent exposure to different types of problems helps sharpen your observational and problem-solving skills.
chat gpt ahh answer
Wdym
blud i typed it for ya
yea thanks tho
Please do not trust ChatGPT or similar AI tools for mathematical tasks, as they often generate output which "sounds correct" but has numerous factual or logical errors. Use of these AI tools to answer other people's help questions is strictly against server rules (see #rules).
what was it
what is it....lawl ?
I study with it I don’t use it as answer cause my teacher is smart ☠️
I struggle with geometry
what
yeah i got it dw
Fr
Alr
😂
.
how old are u bud
.
should we report?
On god
lol
minimum age for discord is 13
bro discord has age restriction
lawl
come when u r 13
dude just gave up
?
fe ?
9th
dayum bro...............creating ur own short terms
gud