If sin x + sin ^(2) x=1, then the value...

If `sin x + sin ^(2) x=1, ` then the value of `cos ^(12) x+3 cos ^(10) x+3 cos ^(8) x + cos ^(6) x-2` is equal to ............. A) 0 B) 1 C) -1 D) 2

A

0

B

1

C

`-1`

D

2

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The correct Answer is:

C

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