Home
Class 12
MATHS
If tanA=5/6a n dtanB=1/(11),\ p rov e\ t...

If `tanA=5/6a n dtanB=1/(11),\ p rov e\ t h a t\ A+B=pi/4`

A

`(pi)/(2)`

B

`(pi)/(4)`

C

`(3pi)/(2)`

D

`pi`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC IDENTITIES

    ARIHANT PUBLICATION JHARKHAND|Exercise EXAM BOOSTER FOR CRACKING EXAM|35 Videos
  • TRIGNOMETRIC RATIOS

    ARIHANT PUBLICATION JHARKHAND|Exercise Exam Booster for Cracking Exam|25 Videos
  • VOLUME AND SURFACE AREA

    ARIHANT PUBLICATION JHARKHAND|Exercise Exam Booster For Cracking Exam |42 Videos

Similar Questions

Explore conceptually related problems

tan A=(5)/(6) andtanB =(1)/(11), prove that A+B=(pi)/(4)

If tanA=1/2andtanB=1/3, then: A+B= (a) pi/4 (b) 0 (c) pi (d) pi/6

If tanA=3/4,cosB=9/(41), w h e r e pi

If A and B are two events such that P(A)=4/5, a n d\ P(AnnB)=7/(10), t h e n\ P(B//A)= 1//10 b. 1//8 c. 7//8 d. 17//20

If A-B=pi/4 , then prove that: (1+tanA)

If P(AuuB)=0. 8\ a n d\ P(AnnB)=0. 3 ,\ t h e n\ P( A )+P( B )= 0. 3 b. 0. 5 c. 0. 7 d. 0. 9

If A : B=1/2:1/3n a d B : C=1/2:1/3, t h e n A : B : C is equal to 1:2:6 b. 3:2:6 c. 2:3:3 d. 9:6:4

If x+y=pi/4a n dtanx+tany=1,t h e n(n in Z) (a)sinx=0a l w a y s (b)when x=npi+pi/4t h e ny=-npi (c)when x=npit h e ny=npi+(pi/4) (d)when x=npi+pi/4t h e ny=npi-(pi/4)

Find the volume in cubic metre (cu. m) of each of the cuboids whose dimensions are: l e n g t h = 12 m , b r e a dt h=10 m , h e igh t=4. 5 m l e n g t h = 4m , b r e a dt h = 2. 5 m , h e igh t = 50 c mdot l e n g t h = 10 m , b r e a dt h = 25 d m , h e igh t = 25 c mdot

If ^n P_r=720a n d^n C_r=120 ,t h e nr to a. 3 b. 4 c. 5 d. 6

ARIHANT PUBLICATION JHARKHAND-TRIGONOMETRIC IDENTITIES-EXAM BOOSTER FOR CRACKING EXAM
  1. Show that sqrt(2+sqrt(2 +2 cos 4 theta))= 2 cos theta

    Text Solution

    |

  2. The value of (tan 47^(@) + tan 43^(@))/(1-tan 47^(@) tan 43^(@)) is

    Text Solution

    |

  3. If tanA=5/6a n dtanB=1/(11),\ p rov e\ t h a t\ A+B=pi/4

    Text Solution

    |

  4. The value of (1)/(sqrt(2)) (cos A - sin A) is

    Text Solution

    |

  5. sin ""(pi)/(4) cos ""(pi)/(12) - cos ""(pi)/(4) sin ""(pi)/(12) is eq...

    Text Solution

    |

  6. Prove than tan 56^(@) =("cos " 11^(@) + "sin " 11^(@))/("cos " 11^(...

    Text Solution

    |

  7. The value of (cos 15^(@) - sin 15^(@))/(cos 15^(@) + sin 15^(@) is

    Text Solution

    |

  8. If tan theta = (x sin phi)/(1-x cos phi) and tan phi =(y sin theta)/(...

    Text Solution

    |

  9. If sin(theta + alpha)=cos(theta + alpha) then the value of tan theta i...

    Text Solution

    |

  10. The value of cos^(2) (theta - phi)/(2) - sin^(2) (theta + phi)/(2) is

    Text Solution

    |

  11. cos^2 4 5^(@)-sin^2 1 5^(@)=

    Text Solution

    |

  12. If 0 le theta le 90^(@), then the value of (5 cos theta - 4)/(3 - 5 si...

    Text Solution

    |

  13. What is the value of cos10^(@)+cos110^(@)+cos130^(@)?

    Text Solution

    |

  14. The value of cos 52^(@) + cos 68^(@) + cos 172^(@) is

    Text Solution

    |

  15. The value of (sin 38^(@) - cos 68^(@))/( cos 68^(@) + sin 38^(@) is

    Text Solution

    |

  16. If cos x = k cos (x - 2y), then the value of tan (x -y).tan y is

    Text Solution

    |

  17. The value of 2 cos x - cos 3x - cos 5x is

    Text Solution

    |

  18. A horse is tied to a post by a rope. If the horse moves along a circul...

    Text Solution

    |

  19. The largest hand of a clock is 42 cm long, then the distance covered b...

    Text Solution

    |

  20. The interior angle of a convex polygon are in AP. The smallest angle i...

    Text Solution

    |