If sintheta+cos theta=sqrt2 cos alpha , ...

If `sintheta+cos theta=sqrt2 cos alpha` , then the general value the `theta` is

A

`2npi - pi/4 pm alpha`

B

`2npi + pi/4 pm alpha`

C

`npi-pi/4 pm alpha`

D

`npi + pi/4 pm alpha`

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The correct Answer is:

B

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