precalculus word problem (solved) | Mathematics | Page 1

storm pumiceBOT Jun 17, 2024, 12:27 AM

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humble knot Jun 17, 2024, 12:57 AM

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well, we can draw a triangle

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and then that angle you put as 43 would be 90+43

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do you see why

true salmon Jun 17, 2024, 12:58 AM

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I was told this aint a right triangle though

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From what my teacher said

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From earlier in the year

true salmon Jun 17, 2024, 12:58 AM

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humble knot do you see why

I dont

humble knot Jun 17, 2024, 12:58 AM

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true salmon I was told this aint a right triangle though

it is not!

true salmon Jun 17, 2024, 12:58 AM

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So why 90

true salmon Jun 17, 2024, 12:59 AM

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humble knot it is not!

??

humble knot Jun 17, 2024, 1:03 AM

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true salmon So why 90

well

true salmon Jun 17, 2024, 1:03 AM

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humble knot well

off topic but can we speak through voice

humble knot Jun 17, 2024, 1:03 AM

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does this make snese

true salmon Jun 17, 2024, 1:03 AM

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humble knot does this make snese

looks like you cut the triangle in half and put a 90 degree angle and marked it as 43 degrees

humble knot Jun 17, 2024, 1:04 AM

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remember that they went 43SoE

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so, that 43 is there

true salmon Jun 17, 2024, 1:04 AM

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humble knot remember that they went 43SoE

43 degrees south east

humble knot Jun 17, 2024, 1:04 AM

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but also, they started going straight south

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so there is a 90 degree angle between south and east

true salmon Jun 17, 2024, 1:04 AM

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they went 20 yeards south

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and 15 yards east

humble knot Jun 17, 2024, 1:05 AM

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yea

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do you see why its 90+43 degrees or nah

true salmon Jun 17, 2024, 1:05 AM

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humble knot do you see why its 90+43 degrees or nah

no

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cause if it were 90 degrees it would be just east

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not south east

humble knot Jun 17, 2024, 1:06 AM

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hmm

true salmon Jun 17, 2024, 1:06 AM

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humble knot hmm

can we go into voice call

humble knot Jun 17, 2024, 1:06 AM

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nope. sorry

true salmon Jun 17, 2024, 1:06 AM

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thats fine

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but still confusing

humble knot Jun 17, 2024, 1:06 AM

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humble knot does this make snese

okay do you understand where this triangle came from

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or no

true salmon Jun 17, 2024, 1:07 AM

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humble knot okay do you understand where this triangle came from

i mean i know its a triangle cause south + south east is 2 sides of a triangle, and going to the start is a direct path so 1 side

humble knot Jun 17, 2024, 1:07 AM

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yes

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and then, we want to use

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do you know what cosine law is

true salmon Jun 17, 2024, 1:07 AM

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i know law of cosines

humble knot Jun 17, 2024, 1:07 AM

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cuz we know two sides, and we can find that angle

true salmon Jun 17, 2024, 1:07 AM

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yes

humble knot Jun 17, 2024, 1:08 AM

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alright, now for finding that angle

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it has two parts

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it first is the angle going from a line straight north to a line straight east

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finally, a line going from straight east to 43 degrees south of east

true salmon Jun 17, 2024, 1:08 AM

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i can do law of cosines

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but i was confused on the whole 90 degrees thing

humble knot Jun 17, 2024, 1:09 AM

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does that help

true salmon Jun 17, 2024, 1:09 AM

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can i send what i think the answer is with law of cosin

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@humble knot i feel like its wrong though

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c^2=15^2+20^2-2(15)(20)*cos43

humble knot Jun 17, 2024, 1:11 AM

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hold on, i only know the notation 43SoE, so does S43E mean this

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or this

humble knot Jun 17, 2024, 1:11 AM

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true salmon c^2=15^2+20^2-2(15)(20)*cos43

yea thats wrong cuz the angle isnt 43

true salmon Jun 17, 2024, 1:12 AM

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humble knot yea thats wrong cuz the angle isnt 43

then wtf is the angle

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they literally said 43

humble knot Jun 17, 2024, 1:12 AM

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ive been trying to explain that for a while 😭

humble knot Jun 17, 2024, 1:12 AM

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humble knot it first is the angle going from a line straight north to a line straight east

.

true salmon Jun 17, 2024, 1:12 AM

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humble knot .

by nature thats a 43 degree angle though, cause its acute

true salmon Jun 17, 2024, 1:13 AM

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humble knot ive been trying to explain that for a while 😭

i still dont get this

humble knot Jun 17, 2024, 1:13 AM

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does that look acute to you

true salmon Jun 17, 2024, 1:13 AM

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humble knot does that look acute to you

looks obtuse now

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@humble knot so is it c^2=15^2+20^2-2(15)(20)*cos133

humble knot Jun 17, 2024, 1:16 AM

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yea! there you go

true salmon Jun 17, 2024, 1:16 AM

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humble knot yea! there you go

wait so if i have any question like this

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with a ne nw se sw kind of degree measure

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i can just add 90

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and do the equation

humble knot Jun 17, 2024, 1:17 AM

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uhhh

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just look at the angle itself

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draw the diagram out

humble knot Jun 17, 2024, 1:18 AM

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humble knot does this make snese

just think about this

true salmon Jun 17, 2024, 1:18 AM

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humble knot just think about this

basically we have to cut the triangle in half

humble knot Jun 17, 2024, 1:18 AM

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not really

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you gotta use the axes

true salmon Jun 17, 2024, 1:18 AM

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axes?

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how did we go from triangles to f-ing axes

humble knot Jun 17, 2024, 1:19 AM

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like, compass

true salmon Jun 17, 2024, 1:20 AM

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humble knot like, compass

so use a compass

humble knot Jun 17, 2024, 1:20 AM

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the N, E, S, W axes

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for 90 degree angles and stuff

true salmon Jun 17, 2024, 1:20 AM

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humble knot the N, E, S, W axes

did you mean axises

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cause when you said axes i thought like cutting wood

humble knot Jun 17, 2024, 1:21 AM

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oh

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axes is the plural form

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but it does also mean 🪓 🪓 you are right

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welcome to english!

true salmon Jun 17, 2024, 1:21 AM

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i played minecraft a lot when i was younger

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wait how do i close this

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precalculus word problem (solved)

dense snow Jun 17, 2024, 2:02 AM

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+close

dense snow Jun 17, 2024, 2:02 AM

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true salmon wait how do i close this

thats how

humble knot Jun 17, 2024, 5:33 AM

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+close

#precalculus word problem (solved)