If cot theta=x/y then the value of (xcos...

If `cot theta=x/y` then the value of `(xcostheta-ysintheta)/(xcostheta+ysintheta)`.

A

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

B

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

C

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

D

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

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The correct Answer is:

A

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