help gsce

[wet wave]

√3/3 × √3/2
= 3/6
= 1/2

[viscid ocean]

Dna has done 13, so I'll do 14.

n² - n when n>1 = N(O) (not odd)
n² - n = n(n-1)

n odd: odd x odd = odd and odd - odd = even
n even: even x even = even and even - even = even

[wet wave]

you need to memorize or remember the exact trig values

[haughty wave]

u can use the equilateral triangle to help u memorise them

cut in half tho

[lone kindle]

https://youtu.be/plyc7tQPZ7s

[haughty wave]

lemme try write it out

[wet wave]

There is a different trick as well to use hand

[haughty wave]

this way is so prone to mistakes i feel like i always prefer the triangle method

[wet wave]

I use the hand trick, but my friends find this useful

[crystal pagoda]

surds shouldnmt be in the denominator

[haughty wave]

rationalise

it

where u multiply both denominator and numerator by the denominator

[lone kindle]

you should binge watch maths genie to get caught up quicker

[haughty wave]

i rationalised it here

quite confusing icl

watch a yt vid

to help u

u see for tan30 i got 1/ root3 but i just rationalised it

😍😍

chaeryeong pfp is cute

[meager mason]

Do you know how to rationalise a surd btw? @grave bloom

[haughty wave]

one day bro u got ur gcses in a month 😭

learn it

[meager mason]

Learn how to rationalise a denominater and it’l help

Rationalising surds is rlly easy

Itll make trig values alot easier too i promise

[haughty wave]

once u learn it once all questions are the same

[meager mason]

You could start going to intervention

[haughty wave]

tbf u should defo revise if ur aiming for 6+

[meager mason]

Someone in this server could teach u its rlly easy

[haughty wave]

u do higher right?

[meager mason]

https://youtu.be/96SwZpRvhwY

Watch this

Once you understand it
Get the trig values in surd fraction form then do the question

[haughty wave]

wait that’s acc decent what grade is that

[meager mason]

Probably a 5

Yea

[haughty wave]

how’s that not a 6 a 4 is like 50 marks

u still need to learn some of the content so just watch videos or do targeted practice questions

then once u feel comfortable do past papers

or do past papers rn to see wat u need work on

any work

For sure

U can move up a grade or two

[meager mason]

Have you got a syllabus or specification of ur maths gcse

Edexcel right?

[meager mason]

^

Okay well search up on safari maths edexcel gcse specification it tells you what you need to learn

Algebraic ratio

Tuff topic

Its like a grade 6 or 7 topic it depresses me

Im year 11 idk how to change to yr11

[meager mason]

Uh

I got banned on snap

Im not gonna say how

😭

Lets leave it at rude how bout we get back to maths??

[wet wave]

17

[meager mason]

To start off

Notice that 3x+5 is one more part than x^2

Make sense so far?

[wet wave]

go to roles and change it

[meager mason]

How?

There

Ty

Anyway

Question 17?

Wait sorry befo we start

Uno the year of this paper

You can go on youtube and im pretty sure someone does a walkthrough of all the questions if you search up maths gcse 2019 june non calc

You should be al good

But please start gounf through your specification

Cognito

Theyve got your whole syllabus on there bro

Im tryna help you ma😭

Make an account on cognito

Bruh😂

https://youtu.be/3BoaRtkSubw

Yep

Make sure you watch the video in like 1.25 itll save time for other topixs or other subjwcts

Go to maths section and it should ask for like your syllabus and like exam board

[latent river]

For the proof, n(n-1)

We know these will be two consecutive integers right

Since n-1 will be the one before n

And since they are consecutive, one has to be odd and one has to be even

So we can assume n is the even and (n-1) is the odd

Like one after another

[meager mason]

Ongoing

[latent river]

like 1 and 2 are consecutive

but 1 and 3 arent

We know anything multiplied by an even number is even

So it proves the statement

Because think about it

n

then n-1

Since its one before n

Its like lets say n is 4

n-1 will be 3

But it works for any n

where n is an integer

yep

And since anything multiplied by an even number is even

it shows the statement is true

For gcse yh usually

Tends to include factorising

If u search up gcse proof questions you’ll see

Its more just spotting what u can do

Like if u want to show its an even number u need to somehow factor the expression to show 2(..)

But like here you cant do that

So u have to use the even and odd rules