SOLUTION: Can you help me prove this trigonometic identity?: (sinƟcosƟ)/(cos^2Ɵ-sin^2Ɵ)=tanƟ/(1-tan^2Ɵ)

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Question 730721: Can you help me prove this trigonometic identity?:
(sinƟcosƟ)/(cos^2Ɵ-sin^2Ɵ)=tanƟ/(1-tan^2Ɵ)

Found 2 solutions by lynnlo, ikleyn:
Answer by lynnlo(4176) About Me  (Show Source):
Answer by ikleyn(53427) About Me  (Show Source):
You can put this solution on YOUR website!
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Can you help me prove this trigonometic identity?:
(sinƟcosƟ)/(cos^2Ɵ-sin^2Ɵ)=tanƟ/(1-tan^2Ɵ)
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Divide both the numerator and the denominator by cos%5E2%28theta%29.