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If cos theta ne 1/2, then the solution ...

If `cos theta ne 1/2, ` then the solution of the equation `cos 2 theta =(sqrt2 +1) (cos theta -(1)/(sqrt2))` are-

A

`2 n pi pm (pi)/(3)`

B

`2n pi pm (pi)/(6)`

C

`2 n pi pm (pi)/(2)`

D

`2 n pi pm (pi)/(4)`

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The correct Answer is:
D
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