The solution of the equation cos^2theta+...

The solution of the equation `cos^2theta+sintheta+1=0` lies in the interval

A

`(-(pi)/(4), (pi)/(4))`

B

`((pi)/(4), (3pi)/(4))`

C

`((3pi)/(4), (5pi)/(4))`

D

`((5pi)/(4), (7pi)/(4))`

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The correct Answer is:

D

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