prove that [ 1/(sec^-2xcos^2x) +1/(cosec^2x-sin^2x)]sin^2xcos^2x= 1-sin^2xcos^2x/2+sin^2xcos^2x

prove that [ 1/(sec^-2xcos^2x) +1/(cosec^2x-sin^2x)]sin^2xcos^2x= 1-si

1.	prove that [ 1/(sec^-2xcos^2x) +1/(cosec^2x-sin^2x)]sin^2xcos^2x= 1-sin^2xcos^2x/2+sin^2xcos^2x
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