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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 ^4 x + sin ^6 x ` is equal to

A

` -1 + sqrt(5) `

B

` (-1-sqrt(5))/( 2)`

C

`(1-sqrt(5))/(2)`

D

`(-1sqrt(5))/(2)`

Text Solution

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The correct Answer is:
D
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