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If tantheta=x/y what is the value of (xs...

If `tantheta=x/y` what is the value of `(xsintheta-ycostheta)/(xsintheta+ycostheta)`

A

`(x^2-y^2)/(x^2+y^2)`

B

`(y^2-x^2)/(x^2+y^2)`

C

`(x^2+y^2)/(y^2-x^2)`

D

None of the above

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The correct Answer is:
A
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