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Find the value of 1-2sin^(2)theta+sin^...

Find the value of `1-2sin^(2)theta+sin^(4)theta`.

A

`sin^(4)theta`

B

`cos^(4)theta`

C

`"cosec"^(4)theta`

D

`sec^(4)theta`

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The correct Answer is:
B
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