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If cos^(4)theta-sin^(4)theta=(2)/(3), th...

If `cos^(4)theta-sin^(4)theta=(2)/(3)`, then the value of `1-2sin^(2)theta` is

A

`(4)/(3)`

B

0

C

`(2)/(3)`

D

`(1)/(3)`

Text Solution

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The correct Answer is:
C
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KIRAN PUBLICATION-TRIGONOMETRY -TYPE - II
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