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If A + B+ C = 3 pi//2 , then the value...

If ` A + B+ C = 3 pi//2` , then the value of cos 2 A + cos 2 B + cos2 C is equal to

A

`1 - 4 cos A * cos B * cos C`

B

`4 sin A * sin B * sin C `

C

`1 + 2 cos A * cos B * cos C `

D

`1 - 4 sin A * sin B * sin C`

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The correct Answer is:
D
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KCET PREVIOUS YEAR PAPERS-MODEL TEST PAPER 02-MATHEMATICS
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