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723. Prove cos-2x-cos-6x = sin 4x sin 8x...

723. Prove cos-2x-cos-6x = sin 4x sin 8x

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Prove that cos^2 2x-cos^2 6x=sin4x sin8x

Prove that: cos^2 2x-cos^2 6x= sin4x sin8x

Prove that: cos^2 2x-cos^2 6x=sin4xsin8x

Prove the following: cos^2 2x - cos^2 6x = sin 4x sin 8x

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x

Prove that cos^(2)2x-cos^(2)6x=sin4xsin8x