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If sinx + sin^(2)x + sin^(3)x = 1, then ...

If `sinx + sin^(2)x + sin^(3)x = 1`, then : `cos^(6)x - 4cos^(4)x + 8cos^(2)x` equals :

A

3

B

4

C

2

D

1

Text Solution

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The correct Answer is:
B
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