# How do you verify the identity: #cos^2x-sin^2x=1-2sin^2x#?

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Alan P.
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Jun 2, 2017

From the basic definitions of

or

So

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Jim H
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Apr 22, 2015

There are many acceptable (correct) ways to do this.

Here's one:

(use

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Tom
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Apr 22, 2015

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