Home
Class 11
MATHS
A+B = 90^(@) rArr cos A cos B in...

`A+B = 90^(@) rArr cos A cos B in`

A

`[ - (1)/(3) , (1)/(3) ]`

B

`[ - (1)/(2) , (1)/(2)]`

C

`[ - (1)/(4) , (1)/(4)]`

D

`[ - (3)/(4) , (3)/(4)]`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • PERIODICITY AND EXTEME VALUES

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE) LEVEL-I(MAIN) Periodicity (Single answer type questions)|17 Videos

  • PAIR OF STRAIGHT LINES

    AAKASH SERIES|Exercise ADVANCED SUBJECTIVE TYPE QUESTIONS|15 Videos

  • PERIODICITY AND EXTREME VALUES

    AAKASH SERIES|Exercise Practice Sheet (Exericise-I) Level-II (Straight Objective Type Questions)|31 Videos

Similar Questions

Explore conceptually related problems

A+B = 90^(@) rArr sin A + sin Bin

If A+B+C=(3pi)/(2) , prove that cos ^(2)A+ cos ^(2) B- cos ^(2)C=-2 cos A cos B sin C.

If A+B+C=90^(@) then (cos 2A+cos 2B+cos 2C-1)/(sin A sin B sin C)=

If 0^(@) lt A, B lt 90^(@) , such that cos A = 5/13, sin B = 4/5 , find sin (A-B) .

If A+B+C=0 , then prove that cos ^(2)A+ cos ^(2) B + cos ^(2) C =1+2 cos A cos B cos C

If A+B+C=90^(@) " then " ( cos 2A + cos 2 B+ cos 2C-1)/( sin A sin B sin C )=

If 0 lt A, B lt 90^(@), cos A= (5)/(13) and sin B =(4)/(5) then find sin (A+B) .

If sin (A-B) =(1)/(2) ,cos (A+B) =(1)/(2) , where 0^@ lt A +B lt 90 ^(@) and A gt B find A and B

AAKASH SERIES-PERIODICITY AND EXTEME VALUES-PRACTICE SHEET (EXERCISE) LEVEL-I(MAIN) Extreme values ( Single answer type questions )
  1. 16 sin x cosx cos 2x cos 4x cos 8x in

    Text Solution

    |

  2. The minimum and maximum values of sin^(2) (60^(@)-x) + sin^(2) ( 60^(@...

    Text Solution

    |

  3. sin^(2) ( 60^(@) + x) sin^(2) ( 60^(@) - x) in [ - (k)/(2) , (k)/(2) ]...

    Text Solution

    |

  4. The extreme values of 4cos(x^(2)).cos((pi)/(3)+x^(2)).cos((pi)/(3)-x^...

    Text Solution

    |

  5. For all values of theta, the values of 3-cos theta+cos (theta+(pi)/(3)...

    Text Solution

    |

  6. 5 cos theta + 3 cos ( theta - (pi)/(3) )+8 in

    Text Solution

    |

  7. A+B = 90^(@) rArr cos A cos B in

    Text Solution

    |

  8. A+B = 90^(@) rArr sin A + sin Bin

    Text Solution

    |

  9. The minimum and maximum values of 8 cos 3x - 15 sin3x are

    Text Solution

    |

  10. The maximum value of (3 ) /( 5 sin x-12 cos x+19) is

    Text Solution

    |

  11. cos5x=16 cos^(5) x -20 cos^(3) x +5 cos x in

    Text Solution

    |

  12. 3 sin^(2) x -4 cos^(2) x in

    Text Solution

    |

  13. Minimum value of 9 sec^(2) theta + 4 cosec^(2) theta + 7 is

    Text Solution

    |

  14. If a le 3 cos x + 5 sin ( x - pi//6) le b for all x , then ( a, b) is

    Text Solution

    |

  15. cos^(2) (60^(@) - x) + cos^(2) (60^(@) +x) in

    Text Solution

    |

  16. sin^(2) x + 4 sin x+5 in [k, 5k ] rArr k =

    Text Solution

    |

  17. The least value of cos^(2) theta - 6 sin theta.cos theta+ 3 sin^(2) th...

    Text Solution

    |

  18. The minimum value of Sinx ((1-cos x)/(sin x) + (sin x)/( 1-cos x)) ...

    Text Solution

    |

  19. If f(x) = 2+ cos^(2) x + sec^(2) x, its value always is

    Text Solution

    |

  20. The maximum value of cos x ((cos x )/( 1- sin x) + (1- sin x)/( cos x)...

    Text Solution

    |