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If x^(2)+y^(2)+z^(2)=r^(2), then Tan^(-1...

If `x^(2)+y^(2)+z^(2)=r^(2)`, then `Tan^(-1)((xy)/(zr))+Tan^(-1)((yz)/(xr))+Tan^(-1)((xz)/(yr))=`

A

`pi`

B

`pi//2`

C

0

D

none

Text Solution

Verified by Experts

The correct Answer is:
D
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