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Verify the identity. cos 4x + cos 2x = 2 - 2 sin^2(2x) - 2 sin^2 x
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Verify the identity.

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

User Mike Mu
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1 Answer

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So are you trying to simplify one side to get it to look like the other?
User Lempkin
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