Question

prove this. ...........​

Answer 1

Answer:

RHS

2(cos^4x +sin^4x)

2(1-2sin^2xcos^2x)

2- sin^2(2x)

1+cos^2(2x)

so

LHS=RHS

Step-by-step explanation:

• (sin^2x+cos^2x)^2=sin^4x+cos^4x+2sin^2xcos^2x
• sin^4x+cos^4x=1-2sin^2xcos^2x

• sin2x=2sinx*cosx

• sin^2x+cos^2x=1