Answers

2014-08-18T12:36:08+05:30
 tan^{2}A =  \frac{ sin^{2}A }{ cos^{2}A } \\  \\  tan^{2}A. cos^{2}A =  sin^{2}A  \\  \\  >>> sin^{2}A = 1 - cos^{2}A \\  \\   tan^{2}A. cos^{2}A = 1 - cos^{2}A
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this is easiest proof , u can pick this best solution/////
yeah
then mark this as best solution ...
okay let someone else answer it
2014-08-18T14:49:16+05:30