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One of the general solutions of 4 sin^(4...

One of the general solutions of `4 sin^(4) x+cos^(4) x=1` is

A

`(2n+1)""(pi)/(2)`

B

`npi`

C

`npi pm sin^(-1)sqrt((2)/(5))`

D

None of these

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The correct Answer is:
B, C
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