Home
Class 12
MATHS
{x in IR : cos 2x + 2 cos^(2) x - 2 = 0}...

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

A

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

B

`{n pi pm (pi)/(6) : n in Z}`

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC EQUATIONS

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 2 (SPECIAL TYPE QUESTIONS) SET - 1|4 Videos

  • TRIGONOMETRIC EQUATIONS

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 2 (SPECIAL TYPE QUESTIONS) SET - 2|4 Videos

  • TRIGONOMETRIC EQUATIONS

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 2 (SPECIAL TYPE QUESTIONS) SET - 4|4 Videos

  • TRANSFORMATION OF AXES

    DIPTI PUBLICATION ( AP EAMET)|Exercise SET-4|3 Videos

  • TRIGONOMETRIC RATIOS AND IDENTITIES

    DIPTI PUBLICATION ( AP EAMET)|Exercise EXERCISE 2 ( SPEICAL TYPE QUESTIONS ) SET -4|20 Videos

Similar Questions

Explore conceptually related problems

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

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

cos 4x = cos 2x

cos 3x + cos x - cos 2x =0

sin 2x + cos x =0

Evaluate the integerals. int (sin 2x)/(a cos ^(2) x + b sin ^(2)x)dx on I sub R \\ {x in R| a cos ^(2)x +b sin ^(2) x =0}.

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|

Solve sin x + cos x - 2sqrt(2) sin x cos x = 0

DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC EQUATIONS -EXERCISE 1
  1. If 4 cos theta - sec theta = 4 tan theta then theta =

    Text Solution

    |

  2. If 3 cos 2theta + 2 = 7 sin theta then theta =

    Text Solution

    |

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

    Text Solution

    |

  4. If 4sin^(2)x-2 (1+sqrt(3))sin x + sqrt(3)=0 then theta =

    Text Solution

    |

  5. If cosec^(2)theta - 3cosec theta + 2 = 0 then theta =

    Text Solution

    |

  6. If 4cos^(2)x sin x - 2 sin^(2)x=3sinx, then x =

    Text Solution

    |

  7. If r sin theta = sqrt(3), r + 4 sin theta = 2(sqrt(3)+1), 0 le theta l...

    Text Solution

    |

  8. If alpha is a root of 25 cos^(2)theta + 5 cos theta - 12 =0, (pi)/(2) ...

    Text Solution

    |

  9. The solution set of (5+4 cos theta) (2 cos theta + 1) =0 in the interv...

    Text Solution

    |

  10. If sin^(2)x - cos x = 1//4 then the values of x in (0, 2pi) are

    Text Solution

    |

  11. If 2cos^(2)theta + cos theta -1 =0 then theta =

    Text Solution

    |

  12. If 2 sin^(2)theta = 3 cos theta, then the value of theta in [0, 2pi] a...

    Text Solution

    |

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

    Text Solution

    |

  14. cos 2x=(sqrt(2)+1)(cos x - (1)/(sqrt(2))), cos x ne (1)/(2) rArr x in

    Text Solution

    |

  15. If 2 sin theta + tan theta = 3 sin theta .cos theta then theta =

    Text Solution

    |

  16. If 2+sqrt(3)sec x - 4 cos x = 2sqrt(3) then theta =

    Text Solution

    |

  17. If 2sin^(2)x + sqrt(3) cos x + 1 =0, then theta =

    Text Solution

    |

  18. If 6 sec^(2)theta - 5 sec theta + 1 = 0 then theta =

    Text Solution

    |

  19. (cos 3theta)/(2cos 2theta-1)=(1)/(2) if

    Text Solution

    |

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

    Text Solution

    |