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If y=(xsinx+cosx)/(xcosx-sinx),then show...

If `y=(xsinx+cosx)/(xcosx-sinx)`,then show that `dy/dx=x^2/(xcosx-sinx)^2`

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 6-EXERCISE
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  10. If y=(xsinx+cosx)/(xcosx-sinx),then show that dy/dx=x^2/(xcosx-sinx)^2

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  11. If n is a such real number that n>3 .then n^2>9 prove it by the method...

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