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cos^(6)A+sin^(6)A=(1)/(4)(1+3cos^(2)2A)...

cos^(6)A+sin^(6)A=(1)/(4)(1+3cos^(2)2A)

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Prove the following : cos^6A+sin^6A = 1/4 (1+3 cos^2 2A)

Prove that: cos^(6)A-sin^(6)A=cos2A(1-(1)/(4)sin^(2)2A)

cos^(6)A+sin^(6)A=1-3/4sin^(2)(2A)

cos^(6)A+sin^(6)A=1-3/4sin^(2)(2A)

Prove the following identities: sin^(6)A+cos^(6)A=1-3sin^(2)A cos^(2)A

Prove the following : cos^6A-sin^6A = cos2A(1-1/4 sin^2 2A)

sin ^ (6) A + cos ^ (6) A = 1-3sin ^ (2) A cos ^ (2) A

cos ^ (6) A-sin ^ (6) A = cos2A (1- (1) / (4) sin ^ (2) 2A)

sin^(6)A+cos^(6)A+3sin^(2)A cos^(2)A=0 b.1c2d.3