If sinx+sin^(2)x=1, then cos^(8)x+2cos^(...

If `sinx+sin^(2)x=1`, then `cos^(8)x+2cos^(6)x+cos^(4)x=`______

A

0

B

`-1`

C

`1`

D

2

Verified by Experts

The correct Answer is:

C

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