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The solution of the equation cos^(2)thet...

The solution of the equation `cos^(2)theta+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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AAKASH SERIES-TRIGONOMETRIC EQUATIONS-Practice Exercise
  1. If sqrt(3) cos theta - sin theta = 1 then theta =

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  2. If 4cos^(2)x-2(1+sqrt(3))cosx+sqrt(3)=0 the solution set in [0,pi] is

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  3. The solution of the equation cos^(2)theta+sintheta+1=0 lies in the int...

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  4. If rsintheta=3andr=4(1+sintheta) where 0ltthetale2pi then theta =

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  5. The general solution of sin^(2)x-2 cos x +(1)/(4)=0 is

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  6. The equation 2Cos^(-1)x=Cos^(-1)(2x^(2)-1) is satisfied by

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  7. The solution set of the equation sin3theta=4sintheta(sin^(2)x-sin^(2...

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  8. The values of P for which the difference between the roots of the equa...

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  9. The number of solutions of the equation sin5thetacos3theta=sin6thetaco...

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  10. If cosec x = 1 + cot x, then x =

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  11. The number of values of y in [-2pi,2pi] satisfying the equation |sin2x...

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  12. If cot theta - tan theta = sec theta, then theta =

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  13. If tantheta+sectheta=sqrt(3), then the principal value of (theta+(pi)/...

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  14. If tantheta+sectheta=sqrt(3), then the principal value of (theta+(pi)/...

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  15. If 3costheta+4sintheta=lambda has a solution find the range of lambda.

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  16. If costheta-sintheta=1, then theta

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  17. If tantheta+sectheta=sqrt(3), then the principal value of (theta+(pi)/...

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  18. The solution set of cos5theta=cos3theta is (ninz)

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  19. The solution set of sin(x+(pi)/4)=sin 2x

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  20. Sinx=2sinxcos2x is satisfied if x belongs to

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