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

If `cos^(-1) x + cos^(-1) y + cos^(-1)z=pi` , then a)`x^2+y^2+z^2+xyz=0` b)`x^2+y^2+z^2+2xyz=0` c)`x^2+y^2+z^2+xyz=1` d)`x^2+y^2+z^2+2xyz=1`

A

`x^2+y^2+z^2+xyz=0`

B

`x^2+y^2+z^2+2xyz=0`

C

`x^2+y^2+z^2+xyz=1`

D

`x^2+y^2+z^2+2xyz=1`

Text Solution

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The correct Answer is:
D
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