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In any triangle ABC. sin ^(2) ""A/2 + si...

In any triangle ABC. `sin ^(2) ""A/2 + sin ^(2) ""B/2 + sin ^(2) ""C/2` is equal to

A

`1- 2 cos ""A/2 cos ""B/2 cso ""C/2`

B

`1- 2 sin ""A/2 cos ""B/2 cos ""C/2`

C

`1- 2 sin ""A/2 sin ""B/2 sin ""C/2`

D

`1- 2 cos ""A/2 cos ""B/2 sin ""C/2`

Text Solution

Verified by Experts

The correct Answer is:
C
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