Question

Evaluate the following using an appropriate identity. cotx – tanx x = [(4 cos^(2x) – 2) / (sin 2x) ]

Answer 1

I used cos^2(2x) = 1/2[ 1 + cos2x ] to reduce the right side to cot(2x).

Should the left side be tan(2x) and cot(2x)?

Answer 2

the left side I left it has ( cos x / sin x ) - (sin x / cos x )