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Prove that : cos^6 A- sin^6 A = cos 2A (...

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

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

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

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

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

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