If cos2theta = (sqrt(2)+1)(costheta -1/s...

If `cos2theta = (sqrt(2)+1)(costheta -1/sqrt(2))`, then value of `theta` is

A

(a) `2npi+(pi)/(4)`

B

(b) `2npipm(pi)/(4)`

C

(c) `2npi-(pi)/(4)`

D

(d) none of these

Verified by Experts

The correct Answer is:

B

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