Posted by
**aziiancaligirl** on
.

Prove:

sin^2(x/2) = csc^2x - cot^2x / 2csc^2(x) + 2csc(x)cot(x)

On the right, factor the numberator as a difference of two perfect squares. In the denominator, factor out 2cscx.

You ought to prodeed rather quickly to the proof.