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tan^(-1)((x)/(y))-tan^(-1)((x-y)/(x+y)) ...

`tan^(-1)((x)/(y))-tan^(-1)((x-y)/(x+y))` is

A

0

B

`(pi)/(4)`

C

`(pi)/(2)`

D

`pi`

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The correct Answer is:
b
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