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If tan ^(-1) x-tan ^(-1) y=-(pi)/(4) the...

If `tan ^(-1) x-tan ^(-1) y=-(pi)/(4)` then

A

x+y+x y=1

B

x=1+y+x y

C

y=1+x+x y

D

x+y=1+x y

Text Solution

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The correct Answer is:
C
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