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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-TRIGNOMETRIC FUNCTIONS -Assignment section-A (Objective Type Questions (One option is correct))
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  3. The minute hand of a watch is 3cm long. How far does its tip move in 2...

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  7. The value of 2sinA cos^(3)A -2sin^(3)A cosA is

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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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  14. If the lengths of the sides of a triangle are 3, 5, 7, then its larges...

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  15. sin^2 75^@-sin^2 15^@=

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  16. If a cosA=b cosB, then triangleABC is

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  17. If a=16, b=24 nad c=20, then the value of cos(B/2) is

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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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