Question

(1-cot theta)2/cosec2theta +2sinthetacostheta=1

Answer 1

please see the answer beyond this
I have not calculated it so far
because I am in tution
will see later

Answer 2

sin2(x) + cos2(x) = 1. tan2(x) + 1 = sec2(x). cot2(x) + 1 = csc2(x). sin(x y) = sin x cos y cos x sin y. cos(x y) = cos x cosy sin x sin y