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If cos x + cos^(2) x =1 then the val...

If ` cos x + cos^(2) x =1 ` then the value of ` sin^(12) x + 3 sin^(10) x + 3 sin^(8) x + sin^(6) x -1` is

A

0

B

1

C

`-1`

D

2

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A
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