Question

√1-sin 2 Φ=cos Φ prove that​

Answer 1

Answer:

As you know the Identity sin^2x+cos^2x=1

So cos^2=1 - sin^2x

In question √1-sin 2 Φ=cos Φ

So put ✓ Cos^2x= rhs

So under root and square root will get cancelled

So cosx = cosx

Proved