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December 20, 2014

December 20, 2014

Posted by **MATH...............** on Thursday, June 9, 2011 at 2:48am.

(i) tan^3x/1+tan^2x + cot^3x/1+cot^2 = 1-2sin^x cos^x/sinx cosx

(ii) (1+cotx+tanx)(sinx-cosx)/sec^3x-cosec^3x = sin^2xcos^2x.

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