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

If `tan ^(-1) x+tan ^(-1) y+tan ^(-1) z=(pi)/(2)` then `x y+y z+z x=`

A

0

B

`x+y+z`

C

`x y z`

D

1

Text Solution

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The correct Answer is:
D
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