Find the general values of theta which ...

Find the general values of `theta ` which satisfies the equation ` tan theta =-1 and cos theta =(1)/(sqrt(2))`

A

`theta = npi +(7pi)/4`

B

`theta = n pi +(-1)^(n)(7pi)/4`

C

`theta = 2npi +(7pi)/4`

D

`theta = 2npi +pi/4`

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The correct Answer is:

C

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