यदि (1+tan x) (1+tan y)=2, तो x+y=...

यदि `(1+tan x) (1+tan y)=2`, तो `x+y=`

A

`pi//2`

B

`pi//3`

C

`pi//4`

D

`pi//6`

Verified by Experts

The correct Answer is:

C

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