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Find the value of tan^(-1)(x/y)-tan^(-1)...

Find the value of `tan^(-1)(x/y)-tan^(-1)((x-y)/(x+y))`

A

`(pi)/(4)`

B

`(pi)/(3)`

C

`(pi)/(2)`

D

`(pi)/(4) or (-3pi)/(4)`

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The correct Answer is:
A
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