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If cos alpha + cos beta + cos gamma= sin...

If `cos alpha + cos beta + cos gamma= sin alpha + sin beta + sin gamma =0`, then the value of `cos 3 alpha + cos 3 beta + cos 3 gamma` is

A

0

B

`cos (alpha + beta+ gamma)`

C

`3cos (alpha + beta +gamma)`

D

`3sin (alpha + beta + gamma)`

Text Solution

Verified by Experts

The correct Answer is:
C
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