Home
Class 11
MATHS
{x inR: cos2x+2cos^(2)x=2} =...

`{x inR: cos2x+2cos^(2)x=2}` =

A

`{2npi+(p)/3, n in Z}`

B

`{n pi +-(pi)/6, n in Z}`

C

`{n pi +-(pi)/3: n in Z}`

D

`{2npi-(pi)/3: n in Z}`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRIGNOMETRIC EQUATIONS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE -I LEVEL -II STRAIGHT OBJECTIVE TYPE QUESTIONS)|9 Videos

  • TRIGNOMETRIC EQUATIONS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE -I LEVEL -II MORE THAN ONE CORRECT ANSWER TYPE QUESTIONS)|11 Videos

  • TRIGNOMETRIC EQUATIONS

    AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE- IV (Linked Comprehension Type Questions)|3 Videos

  • TRANSFORMATIONS

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE-I LEVEL-I Straight Objective Type Questions)|41 Videos

  • TRIGONOMERTIC RATIOS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|77 Videos

Similar Questions

Explore conceptually related problems

{x in IR : cos 2x + 2 cos^(2) x - 2 = 0}=

cos 4x = cos 2x

int (1)/(2 sin^(2) x + 3 sin x cos x - 2 cos^(2) x ) dx =

Common roots of the equations of cos2x+sin2x=cotx and 2cos^(2)x+ cos^(2)2x=1

The number of common roots of simultaneous equation cos 2 x + sin 2 x = cot x and 2 cos ^(2) x + cos ^(2) 2 x = 1 x in |-pi, pi|

AAKASH SERIES-TRIGNOMETRIC EQUATIONS-PRACTICE SHEET (EXERCISE -I LEVEL -I STRAIGHT OBJECTIVE TYPE QUESTIONS)
  1. If cos x cos 2x cos 3x=1//4, then x=

    Text Solution

    |

  2. Solution of cot^(2)theta+[sqrt(3)+1/(sqrt(3))]cot theta+1=0 is

    Text Solution

    |

  3. {x inR: cos2x+2cos^(2)x=2} =

    Text Solution

    |

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

    Text Solution

    |

  5. The solution of the equation sec theta - cosec theta =4/3 is

    Text Solution

    |

  6. All the values of x satisfying sin2x+sin4x=2sin3x are

    Text Solution

    |

  7. If 3 cos x ne 2 sin x, then the general solution of sin^(2) x - cos 2x...

    Text Solution

    |

  8. Solve 2sin^(2)x+sin^(2)2x=2

    Text Solution

    |

  9. IF cos theta ne 0, and sec theta-1=(sqrt2-1) tan theta then theta=

    Text Solution

    |

  10. If 4 cot 2 theta=cot^(2)theta-tan^(2)theta then theta=

    Text Solution

    |

  11. The solution of 4 sin^(2) x + tan^(2) x + cosec^(2) x + cot^(2) x - 6 ...

    Text Solution

    |

  12. If tan theta + tan 2theta = tan 3theta, then theta =

    Text Solution

    |

  13. Which of the following is true for z=(3+2i sin theta)//(1-2 i sin thet...

    Text Solution

    |

  14. If 3 tan ^(2) theta - 2 sin theta = 0 " then " theta =

    Text Solution

    |

  15. If sin 3 theta - sin theta = 4 cos ^(2) theta - 2 " then " theta =

    Text Solution

    |

  16. Find the general solution for each of the following equations : tant...

    Text Solution

    |

  17. The number of solutions of the equation cos^(2)(pi)/3 cos x-(8pi)/3=1 ...

    Text Solution

    |

  18. The number of roots of the equation 2 sin^(2)theta + 3 sin theta + 1 =...

    Text Solution

    |

  19. The number of values of x in the interval [0, 5 pi] satisfying the equ...

    Text Solution

    |

  20. If 5 cos 2 theta + 2 cos ^(2) ""(theta)/(2) + 1 = 0 , - pi lt theta l...

    Text Solution

    |