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If alpha+beta=gamma. then cos^(2...

If `alpha+beta=gamma. then
`cos^(2)alpha+cos^(2)beta+cos^(2)gamma-2 cos alpha cos beta cos gamma=`

A

1

B

`0`

C

`-1`

D

`2`

Text Solution

Verified by Experts

The correct Answer is:
A
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