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

`tan ^(-1) x + tan ^(-1) y + tan ^(-1) z = pi,` तब `(1)/(xy) + (1)/(yz)+ (1)/( zx)` बराबर है -

A

xyz

B

0

C

1

D

`(1)/(xyz)`

Verified by Experts

The correct Answer is:

C

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