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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)`

Text Solution

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-TRIGNOMETRIC FUNCTIONS -Assignment section-A (Objective Type Questions (One option is correct))
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  2. If "tan"A=1/(2),"tan"B=1/(3), then "tan"(2A+B) is equal to

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  3. The minute hand of a watch is 3 cm long. How far does its tip move in ...

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  4. If sintheta=(-4)/(5) and theta lies in third quadrant, then the value...

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  5. The value of tan75^(@) =

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  8. If tanalpha=(sqrt(3)+1)/(sqrt(3)-1), then the expression cos 2alpha +(...

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  9. If sin^2 theta=1/4 , then the value of theta is

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  10. The solution of the equation cos^2theta+sintheta+1=0 lies in the inter...

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  11. The general solution of tan3x=1 is

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  13. Number of solution of the equation tanx+secx=2cosx lying in the interv...

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  18. If a=1+sqrt(3), b=2 and c=sqrt(2), then the measure of angleB is

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  19. If angleA=60^(@), b=2 and c=4, then the value of a is

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  20. If b=sqrt(3), c=1 and angleA=30^(@), then the measure of angleB is

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