Question

Prove that:


please be quick!!! (^_^)

Answer 1

first of all lets take the lhs and the tan^2[tex](1+tan)^2/(1+cot)^2 = (1+sin/cos)^2/(1+cos/sin)^2 = {(sin(sin+cos))/(cos(sin+cos))}^2 = tan^2

Answer 2

I've done it in the paint, look at the image.

Hope it helps. ^^