{x inR:cos2x+2cos^(2)x=2} is equal to...

`{x inR:cos2x+2cos^(2)x=2}` is equal to

A

`{2n pi + (pi)/(3) : n in Z}`

B

`{n pi pm (pi)/(6) : n in Z}`

C

`{n pi +(pi)/(3) : n in Z}`

D

`{2n pi - (pi)/(3) : n in Z}`

Verified by Experts

The correct Answer is:

B

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