SOLUTION: cos^2x-sin^2x=2cos^2x-1 verify the identity

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Question 587878: cos^2x-sin^2x=2cos^2x-1 verify the identity
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
cos^2x-sin^2x=2cos^2x-1 verify the identity
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Since sin^2 = 1-cos^2,
substitute to get:
cos^2 - (1-cos^2)
= 2cos^2-1
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Cheers,
Stan H.