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# C2 maths help watch

1. Why does (sin 2x) / (cos 2x) = tan 2x . I thought the answer was tan x because the 2s cancel each other out
2. (Original post by man111111)
Why does (sin 2x) / (cos 2x) = tan 2x . I thought the answer was tan x because the 2s cancel each other out
nah, g math don't work like that.

is a function.

is a function

You are applying to that function, you can't just cancel the (2x). Imagine the trig functions as vacuum cleaners, once you suck something up with the vacuum cleaner you can't get it back in it's purest form.
3. if it was 2sin x and 2cos x you could've cancel the 2s out, ah man i do miss a level maths :')
4. As a more general formula

So....

In words, Sine of anything, divided by cosine of that same anything equals tangent of that same anything

Have I left anything out?

nah that's moist
5. (Original post by Apachai Hopachai)
As a more general formula

So....

In words, Sine of anything, divided by cosine of that same anything equals tangent of that same anything

Have I left anything out?

nah that's moist
That "anything" cannot equal for otherwise you get division by 0
6. (Original post by RDKGames)
That "anything" cannot equal for otherwise you get division by 0
yes
7. (Original post by RDKGames)
That "anything" cannot equal for otherwise you get division by 0

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