The general solution of sin^(2)x-2 cos x...

The general solution of `sin^(2)x-2 cos x +(1)/(4)=0` is

A

`2 n pi pm pi//2, n in Z`

B

`n pi pm pi//2, n in Z`

C

`2 n pi pm pi//3, n in Z`

D

`n pi pm (pi)/(3), n in Z`

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The correct Answer is:

C

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