Home
Class 11
MATHS
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

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • TRANSFORMATION FORMULAE

    RD SHARMA ENGLISH|Exercise All Questions|145 Videos

  • TRIGONOMETRIC FUNCTIONS

    RD SHARMA ENGLISH|Exercise All Questions|166 Videos

Similar Questions

Explore conceptually related problems

Solve the equation 2cos^2theta+3sintheta=0

One root of the equation "cos" theta-theta + (1)/(2) = 0 lies in the interval

The solution of the equation 1-"cos" theta = "sin" theta "sin" (theta)/(2) is

The solution of the equation cos^2theta-2costheta=4sintheta-sin2theta where theta in [0,pi] is

The number of solutions of the equation 2 tan^2theta-7sec theta-2 = 0 in the interval [0, 6pi] is

The number of solutions of the equation "cos"^(7) theta + "sin"^(4) theta = 1 in the interval (-pi, pi) , is

Solve that following equations : 2cos^2theta+3sintheta=0

If y =4sin^(2)theta-cos2theta ,then y lies in the interval

The number of solutions of equations 3cos2theta+5costheta =1 in [0,2pi] is

If sqrt3sin theta+costhetagt0, then theta lies in the interval

RD SHARMA ENGLISH-TRIGONOMETRIC EQUATIONS-All Questions
  1. Solve the following equation: sin2theta-sin4theta+sin6theta=0

    Text Solution

    |

  2. Solve the following equation: t a ntheta+t a n2theta+t a n3theta=0

    Text Solution

    |

  3. Write the general solution of tan^2 2x=1.

    Text Solution

    |

  4. Solve the equation 5cos^2 theta+7sin^2theta-6=0

    Text Solution

    |

  5. Writhe the number of values of theta\ in\ [0,2pi] thast satisfy the eq...

    Text Solution

    |

  6. If 2sin^2theta=3\ costheta,\ w h e r e\ 0lt=thetalt=2pi, then find the...

    Text Solution

    |

  7. The smallest value of theta satisfying the equation sqrt(3)(cottheta+t...

    Text Solution

    |

  8. If costheta+sqrt(3)sintheta=2, then theta= a. pi//3 b. 2pi...

    Text Solution

    |

  9. The general solution of the equation 7cos^2theta+3sin^2theta=4 is thet...

    Text Solution

    |

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

    Text Solution

    |

  11. The number of solution in [0,pi//2] of the equation cos3xtan5x=sin7x i...

    Text Solution

    |

  12. The general value of x satisfying the equation satisfying the equati...

    Text Solution

    |

  13. The smallest positive angle (in degree) which satisfies the equation 2...

    Text Solution

    |

  14. If 4sin^2theta=1, then the values of theta are 2npi+-pi/3,\ n in Z b....

    Text Solution

    |

  15. If cottheta-tantheta=sectheta , then theta is equal to

    Text Solution

    |

  16. A value of theta satisfying costheta+sqrt(3)\ sin theta=2 is a.(5pi)/3...

    Text Solution

    |

  17. If sqrt(3)costheta+sintheta=2 , then general value of theta is:

    Text Solution

    |

  18. General solution of tan5theta=cot2theta is a. (npi)/7+pi/2^(\ ) b. the...

    Text Solution

    |

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

    Text Solution

    |

  20. If cos theta=-1/2 and 0^@ < theta < 360^@ then the solutions are

    Text Solution

    |