Home
Class 12
MATHS
(cosA)/(3)=(cosB)/(4)=(1)/(5), -(pi)/(2)...

`(cosA)/(3)=(cosB)/(4)=(1)/(5), -(pi)/(2) lt A lt 0, 0 lt B lt (pi)/(2)`, then `3sinA+4sinB=`

A

0

B

`-1`

C

`24//5`

D

1

Text Solution

Verified by Experts

The correct Answer is:
a
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRICAL IDENTITIES AND EQUATIONS

    MCGROW HILL PUBLICATION|Exercise EXERCISE (LEVEL 2 Single Correct Answer Type Questions)|30 Videos

  • TRIGONOMETRICAL IDENTITIES AND EQUATIONS

    MCGROW HILL PUBLICATION|Exercise EXERCISE (Numerical Answer Type Questions)|32 Videos

  • TRIGONOMETRICAL IDENTITIES AND EQUATIONS

    MCGROW HILL PUBLICATION|Exercise EXERCISE (Concept-based Single Correct Answer Type Questions ) |20 Videos

  • THE DIMENSIONAL GEOMETRY

    MCGROW HILL PUBLICATION|Exercise QUESTIONS FROM PREVIOUS YEARS. B-ARCHITECTURE ENTRANCE EXAMINATION PAPERS|25 Videos

  • VECTOR ALGEBRA

    MCGROW HILL PUBLICATION|Exercise QUESTIONS FROM PREVIOUS YEARS. B-ARCHITECTURE ENTRANCE EXAMINATION PAPERS|20 Videos

Similar Questions

Explore conceptually related problems

If 0 lt x lt pi /2 then

If 0 lt x lt pi/2 then

If 0 lt x lt pi/2 then

If (cos A)/3= (cos B)/4= 1/5, - pi/2 lt A lt 0 and - pi/2 lt B lt 0 then the value of 2 sin A + 4 sin B is

If (sinA)/(sinB)=(sqrt(3))/(2) and (cosA)/(cosB)=(sqrt(5))/(2) , 0 lt A, B lt (pi)/(2) then tanA+tanB is equal to :

If cos A =3/5, cos B=4/5 and (-pi)/(2) lt A lt 0,(-pi)/(2) lt B lt 0, then the value of 2 sin A+4 sin B=

If 3 cot A =-6, sec B =-2 sqrt10, where pi /2 lt A lt pi , pi lt B lt (3pi)/(2), then cosec A- tan B is equal to

MCGROW HILL PUBLICATION-TRIGONOMETRICAL IDENTITIES AND EQUATIONS -EXERCISE (LEVEL 1 Single Correct Answer Type Questions)
  1. (1+cos (pi//8))(1+cos(3pi//8))(1+cos(5pi//8)) (1+cos(7pi//8))=

    Text Solution

    |

  2. If 2 cos x +2cos 3x=cosy, 2 sinx+2sin3x=siny then the vlaue of cos 2x ...

    Text Solution

    |

  3. (cosA)/(3)=(cosB)/(4)=(1)/(5), -(pi)/(2) lt A lt 0, 0 lt B lt (pi)/(2)...

    Text Solution

    |

  4. The value of log(3)tan 1^(@)+log(3)tan 2^(@)+….+ log(3)tan89^(@) is

    Text Solution

    |

  5. If (tan^(3)((pi//2)-theta))/(sec^(2)theta)*(cot^(2)theta)/(sec((pi//2)...

    Text Solution

    |

  6. The number of solutions of sin theta+2 sin 2 theta+3 sin 3 theta+4 si...

    Text Solution

    |

  7. cos11^(@)-cos2^(@) is

    Text Solution

    |

  8. If sin A, cosA and tan A are in G.P., then cot^(6)A-cot^(2)A=

    Text Solution

    |

  9. If cosx-sinx=1//2, then tan2x=

    Text Solution

    |

  10. Which of the following gives the least value of A

    Text Solution

    |

  11. If n in N and sin((pi)/(2n))+cos((pi)/(2n))=(sqrt(n))/(2), then a poss...

    Text Solution

    |

  12. If 4n alpha=pi, then the value of tan alpha tan 2alpha tan 3 alpha…… t...

    Text Solution

    |

  13. If x gt0 and |(x, sin theta, cos theta),(-sin theta, x, 1),(cos theta,...

    Text Solution

    |

  14. If 2tan(pi//3) cos (2pi x)=sqrt(3), the general solution of the equati...

    Text Solution

    |

  15. 2cos^(2)x+4cosx=3sin^(2)x if

    Text Solution

    |

  16. 6tan^(2)x-2cos^(2)x=cos2x if

    Text Solution

    |

  17. The greatest value of cos theta for which cos 5 theta=0 is

    Text Solution

    |

  18. If tan p theta= tan q theta, then the values of theta form an A.P. wit...

    Text Solution

    |

  19. The equation int(0)^(x).(t^(2)-8t+13) dt =x sin(a//x) has a solution i...

    Text Solution

    |

  20. The smallest positive root of the equation sqrt(sin(1-x))=sqrt(cosx)...

    Text Solution

    |