Thread: Prove that
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Old July 4th, 2009, 11:41 AM
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Quote:
Originally Posted by Sanjana Das View Post
[1+cosA+sinA] = 1+sinA
[1+cosA-sinA] ... cosA

plzzzzz help meeee .......with this question....
\frac{1+cosA+sinA}{1+cosA-sinA}.\frac{cosA-sinA-1}{cosA-sinA-1}

=\frac{cos^2A-sin^2A-2sinA-1}{-2sinAcosA}

=\frac{1+sinA}{cosA}
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