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the value of 1/8 (3-4 cos 2 theta + c...

the value of ` 1/8 (3-4 cos 2 theta + cos 4 theta )` is

A

`cos 4 theta `

B

` sin 4 theta `

C

` sin^4 theta `

D

`cos^4 theta`

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The correct Answer is:
C
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