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Math Help - prove it urgent

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    prove it urgent

    sqrt(1+cos a/1-cos a) = sin a / 1-cos a
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  2. #2
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    Quote Originally Posted by anilvvkumar View Post
    sqrt(1+cos a/1-cos a) = sin a / 1-cos a
    Hint: \frac{1 - \cos a}{1 + \cos a} = \frac{1 - \cos a}{1 + \cos a} \times \frac{1 + \cos a}{1 + \cos a}  = \frac{1 - \cos^2 a}{(1 + \cos a)^2} = \frac{\sin^2 a}{(1 + \cos a)^2}
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