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If x = cos theta cos phi + sin theta sin...

If `x = cos theta cos phi + sin theta sin phi cos psi`,`y = cos theta sin phi - sin theta cos phi cos psi` and `z = sin theta sin psi`, then `x^(2) + y^(2) + z^(2)` equals :

A

0

B

`-1`

C

1

D

None of these.

Text Solution

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The correct Answer is:
C
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