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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