The Total solution for NCERT class 6-12
Let us consider LHS:
[1 тАУ cos 2x+ sin 2x] / [1 + cos 2x + sin 2x]
We know that, cos 2x = 1 тАУ 2 sin2┬аx
= 2 cos2┬аx тАУ 1
Sin 2x = 2 sin x cos x
So,