Question

Prove that the following identity is true.

(1/1 + cos x) + (1/1 − cos x) = 2 csc^2

Answer 1

add

Answer 2

\[\frac{1}{1+a}+\frac{1}{1-a}=\frac{1+a+1-a}{1-a^2}\]

Answer 3

Ok What confuses me is the part I got incorrect in the image.

Answer 4

ooh because you made a mistake in the third line

Answer 5

Yea, I have no idea how to get that part.

Answer 6

the machine thinks you are an idiot, so instead of giving you the whole denominator to fill in, it already filled in part of it for you

Answer 7

on no, you are right. damn

Answer 8

lol, hmm... that weird. Ok Thanks.

Answer 9

i mean \(1-\sin^2(x)\)

Answer 10

Hmm.. it didn't work. That was my last shot at it lol.

Answer 11

Thanks though