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If tan^(2)alpha tan^(2)beta+tan^(2)gamma...

If `tan^(2)alpha tan^(2)beta+tan^(2)gamma+tan^(2)gamma tan^(2)alpha+2tan^(2)alpha tan^(2)beta tan^(2)gamma=1`, then the value of `sin^(2)alpha+sin^(2)beta+sin^(2)gamma` is

A

0

B

`-1`

C

1

D

`+-1`

Text Solution

Verified by Experts

The correct Answer is:
C
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