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Posted by K-Rob on April 18, 19100 at 04:32:01:

I need help verifying the following trigonometric identity.
(1 - cos^2x)(1 + cos^2x)= 2sin^2x - sin^4x

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Re: Help needed Guru 14:18:50 5/25/100 (0)

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Comments: : I need help verifying the following trigonometric identity. : (1 - cos^2x)(1 + cos^2x)= 2sin^2x - sin^4x

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