" (v) "sin^(4)x+cos^(4)x=1-(1)/(2)sin^(2)2x

Prove that, sin^(4) x + cos^(4) x = 1- 1/2 sin^(2) 2x

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

prove that: sin ^ (4) x + cos ^ (4) x = 1- (1) / (2) sin ^ (2) 2x

Solev (sin^(2) 2x+4 sin^(4) x-4 sin^(2) x cos^(2) x)/(4-sin^(2) 2x-4 sin^(2) x)=1/9 .

Solve (sin^(2) 2x+4 sin^(4) x-4 sin^(2) x cos^(2) x)/(4-sin^(2) 2x-4 sin^(2) x)=1/9 .

If sin x+cos x=a, then prove that: sin^(6)x+cos^(6)x=1-(3)/(4)(a^(2)-1)^(2) where a^(2)<=2

If sin x+cos x=a then prove that: sin^(6)x+cos^(6)x=1-(3)/(4)(a^(2)-1)^(2), where a^(2)<=2

Prove that sin^4x + cos^4x = 1 - 2sin^2xcos^2x

If (cos^(4)x)/(cos^(2)y)+(sin^(4)x)/(sin^(2)y)=1 , then (cos^(4)y)/(cos^(2)x)+(sin^(4)y)/(sin^(2)y) equal :