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cos^(6) A + sin^(6) A = 1 - k sin^2 (2A)...

`cos^(6) A + sin^(6) A = 1 - k sin^2 (2A) implies k = `

A

`1/4`

B

`1/2`

C

`3/4`

D

1

Text Solution

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The correct Answer is:
C
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