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A solution of the equation cos^2theta+si...

A 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)`

A

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

B

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

C

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

D

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

Text Solution

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The correct Answer is:
D
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