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did you write this down correctly

yes

its very confusing

are you sure the last one shouldn't be
\[1 - 2 \cos^{2}(x) \]
instead of
1 - 2 cos 2x

yes that is what i meant sorry it didnt square it

Ok try starting by rewriting tan x as sin x / cos x
and cot x as cos x / sin x

ok so cos^2x/sinx ?

at the end ?

last step would just be add 2 cos^2(x) to both sides

i dont understand where the 2cos^2x came from

and we have the identity
\[\sin^{2} x + \cos^{2} x = 1\]

oh ok i understand! thanks! do you think you can help me out with another one?

sure but they recommend you close this question and start another one

brb though

ok so ill open another