SOLUTION: I need to prove the identity. (cos 2x) / (1

SOLUTION: I need to prove the identity. (cos 2x) / (1 - tan^2 x) = cos^2 x

Question 929094: I need to prove the identity.
(cos 2x) / (1 - tan^2 x) = cos^2 x
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
prove the identity.
(cos 2x) / (1 - tan^2 x) = cos^2 x
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Multiply both sides by (1-tan^2(x)) to get:
cos(2x) = cos^2(x) - sin^2(x)
---
cos(2x) = cos(2x)
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Cheers,
Stan H.
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