1+cos^(2)2 theta=2(cos^(4)theta+sin^(4)theta)

Prove that: 1+cos^2 2theta=2(cos^4theta+sin^4theta)

Prove that 1+cos^2 2theta=2(cos^4theta+sin^4theta)

The value of (2(sin^(6)theta+cos^(6)theta)-3(sin^(4)theta+cos^(4)theta))/(cos^(4)theta-sin^(4)theta-2cos^(2)theta) is :

Prove that : cos^(4)theta - cos^(2)theta = sin^(4)theta - sin^(2) theta

Prove that : sin^(2)theta+cos^(4)theta=cos^(2)theta+sin^(4)theta

Prove that : sin^(2)theta+cos^(4)theta=cos^(2)theta+sin^(4)theta

What is the value of ( 1 - 2 sin ^(2) theta cos^(2) theta )/( sin ^(4) theta + cos^(4) theta ) + 4 equal to

Prove the following identities: 2(sin^(6)theta+cos^(6)theta)-3(sin^(4)theta+cos^(4)theta)+1=0sin^(6)theta+cos^(6)theta+3sin^(2)theta cos^(2)theta=1(sin^(8)theta-cos^(8)theta)=(sin^(2)theta-cos^(2)theta)(1-2sin^(2)theta cos^(2)theta)