Verify the identity: 2\cos^4x-\cos^2x-2\sin^2x\cos^2x+\sin^2x=\cos^2x

Travis Caldwell

Travis Caldwell

Answered question

2022-04-20

Verify the identity:
2cos4xcos2x2sin2xcos2x+sin2x=cos2x

Answer & Explanation

despescarwh9

despescarwh9

Beginner2022-04-21Added 15 answers

2cos4xcos2x2sin2xcos2x+sin2x
=cos2x(2cos2x1)sin2x(2cos2x1)
=(2cos2x1)(cos2xsin2x)

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