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" (2)."cos4x=1-8sin^(2)x cos^(2)x...

" (2)."cos4x=1-8sin^(2)x cos^(2)x

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Prove that :cos4x=1-8sin^(2)x cos^(2)x

Prove that cos4x=1-8sin^(2)xcos^(2)x

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

cos 4x =1- 8 sin ^(2) x cos ^(2) x

cos 4x =1- 8 sin ^(2) x cos ^(2) x

cos 4x =1- 8 sin ^(2) x cos ^(2) x

cos 4x =1- 8 sin ^(2) x cos ^(2) x

cos 4x =1- 8 sin ^(2) x cos ^(2) x

Integrate the functions (sin^(8)-cos^(8)x)/(1-2sin^(2)x cos^(2)x)

prove that sin^(8)x-cos^(8)x=(sin^(2)x-cos^(2)x)(1-2sin^(2)x cos^(2)x)