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.
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.