I need to verify the given identity. I've tried every which way i can think of, but can't figure this one out. I am self-studying this book "College Trigonometry 5th Edition by Aufmann.(adsbygoogle = window.adsbygoogle || []).push({});

This is exercise set 3.3, problem 63.

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

Can anyone figure this out, or is this a misprint?

Thanks for your help,

Joe

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# Homework Help: I can't figure this Trig Identity out help please?

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