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

`tan^(-1) ((x)/(y)) - tan^(-1) (x - y)/(x + y)` का मान है -

A

`(pi)/(2)`

B

`(pi)/(3)`

C

`(pi)/(4)`

D

`-(3 pi)/(4)`

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