Home
Class 12
MATHS
If cos 2 theta =(sqrt(2)+1)( cos theta ...

If ` cos 2 theta =(sqrt(2)+1)( cos theta -(1)/(sqrt(2)))`, then the value of ` theta ` is

A

`2 n pi +(pi)/(4)`

B

`2n pi pm (pi)/4`

C

`2npi -(pi)/4`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC EQUATIONS AND INEQUATIONS

    ARIHANT MATHS|Exercise Exercise (More Than One Correct Option Type Questions)|25 Videos

  • TRIGONOMETRIC EQUATIONS AND INEQUATIONS

    ARIHANT MATHS|Exercise Exercise (Passage Based Questions)|13 Videos

  • TRIGONOMETRIC EQUATIONS AND INEQUATIONS

    ARIHANT MATHS|Exercise Exercise For Session 4|8 Videos

  • THREE DIMENSIONAL COORDINATE SYSTEM

    ARIHANT MATHS|Exercise Three Dimensional Coordinate System Exercise 12 : Question Asked in Previous Years Exam|2 Videos

  • TRIGONOMETRIC FUNCTIONS AND IDENTITIES

    ARIHANT MATHS|Exercise Exercise (Questions Asked In Previous 13 Years Exam)|18 Videos

Similar Questions

Explore conceptually related problems

If sin theta=1/2 and cos theta=-(sqrt3)/2 , then the general value of theta is:

If sin theta=sqrt3/2 and cos theta= -1/2 then theta lies in :

Let u = cot^(-1) sqrt(cos 2 theta) - tan^(-1) sqrt( cos 2 theta) , then the value of sin u is

If 5 cos 2 theta +2 cos^2 (theta/2)+1=0 , when (0 ltthetalt pi) , then the values of theta are :

Let sin theta= -1/2 and cos theta= -sqrt3/2 , then theta lies in :

Prove the following : cos 7 theta + cos 5 theta + cos 3 theta +cos theta =4 cos theta cos2 theta cos4 theta for all value of theta .

If (25)^(2)+a^(2)+50a cos theta =(31)^(2)+b^(2)+62 b cos theta=1 and 775 + ab + (31a+25b) cos theta=0 , then the value of cosec^ (2) theta is

If sin theta_1 + sintheta_2 + sin theta_3 = 3 then find the value of cos theta_1 + cos theta_2 + cos theta_3.

If (cos^(3) theta )/( (1- sin theta ))+( sin^(3) theta )/( (1+ cos theta ))=1+ cos theta , then number of possible values of theta is ( where theta in [0,2pi] )

Solve cos theta * cos 2 theta * cos 3 theta = (1)/( 4), 0 le theta le pi

ARIHANT MATHS-TRIGONOMETRIC EQUATIONS AND INEQUATIONS-Exercise (Single Option Correct Type Questions)
  1. The number of solutions of the equation cos 4x+6=7 cos 2x , when x ...

    Text Solution

    |

  2. The number of solutions of cot(5pi sin theta )=tan (5 pi cos theta ),...

    Text Solution

    |

  3. If e^[(sin^(2)x+sin^(4) x +sin^(6)x+.... oo) loge2] satisfies the equ...

    Text Solution

    |

  4. The total number of solutions of cos x= sqrt(1- sin 2x) in [0, 2pi] is...

    Text Solution

    |

  5. Solve : cos 3x. Cos^(3)x+sin 3x.sin^(3)x=0

    Text Solution

    |

  6. Total number of solutions of sinx=(|x|)/(10) is equal to

    Text Solution

    |

  7. The number of all possible 5-tuples (a(1),a(2),a(3),a(4),a(5)) such th...

    Text Solution

    |

  8. alpha and beta are two positive value of x for which 2 cos x,|cos x...

    Text Solution

    |

  9. If cos x-(cot beta sinx )/( 2 )=sqrt(3)/(2) , then the value of tan...

    Text Solution

    |

  10. The expression nsin^(2) theta + 2 n cos( theta + alpha ) sin alph...

    Text Solution

    |

  11. The value of the determinants |{:(1,a,a^(2)),(cos(n-1)x,cos nx , cos(n...

    Text Solution

    |

  12. If sin (3alpha) /cos(2alpha) < 0 If alpha lies in

    Text Solution

    |

  13. If f(x)=|{:( sin^2 theta , cos^(2) theta , x),(cos^(2) theta , x , sin...

    Text Solution

    |

  14. The equation sin x + sin y + sin z =-3 "for " 0 le x le 2pi , 0 le y l...

    Text Solution

    |

  15. If sec x cos 5x+1=0 , where 0lt x ltπ/2, then x=

    Text Solution

    |

  16. If |k|=5 and 0^(@) le theta le 360^(@) , then the number of different...

    Text Solution

    |

  17. If "cot"(alpha+beta=0, then "sin"(alpha+2beta can be

    Text Solution

    |

  18. If : cot theta + cot((pi)/4 + theta) = 2, then : theta =

    Text Solution

    |

  19. If cos 2 theta =(sqrt(2)+1)( cos theta -(1)/(sqrt(2))), then the valu...

    Text Solution

    |

  20. Evaluate int(sin^2x + cos^2x)dx

    Text Solution

    |