Home
Class 11
MATHS
In Delta ABC, if cot""A/2: cot""B/2:cot ...

In `Delta ABC, if cot""A/2: cot""B/2:cot ""C/2=1:4:15`, then the greatest angle of the triangle is

A

`pi//3`

B

`pi//4`

C

`pi//6`

D

`2pi//3`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • PROPERTIES OF TRIANGLES

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE-III) (LEVEL-I) (Straight Objective Type Questions)|42 Videos

  • PROPERTIES OF TRIANGLES

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE-III) (LEVEL-II) (Straight Objective Type Questions)|39 Videos

  • PROPERTIES OF TRIANGLES

    AAKASH SERIES|Exercise PRACTICE SHEET (EXERCISE-II) (LEVEL-I) |32 Videos

  • PLANES

    AAKASH SERIES|Exercise ADVANCED SUBJECTIVE TYPE QUESTIONS|30 Videos

  • PROPERTIES OF VECTORS

    AAKASH SERIES|Exercise PRACTICE EXERCISES|55 Videos

Similar Questions

Explore conceptually related problems

In Delta ABC, if cot""A/2:cot""B/2:cot""C/2=3:7:9 , then a:b:c=

In DeltaABC,r^2 cot""A/2.cot""B/2.cot""C/2=

In DeltaABC,r(cot""A/2+cot""B/2+cot""C/2)=

In DeltaABC,r^3 cot^2""A/2.cot^2""B/2.cot^2""C/2=

In Delta ABC, if s=2b then cot""A/2 cot ""C/2 =

In DeltaABC,r_1cot""A/2+r_2cot""B/2+r_3cot""C/2=

In Delta ABC,if 3a=b+c , then cot""B/2.cot""C/2 =

In DeltaABC,r(r_1cot""A/2+r_2cot""B/2+r_3cot""C/2)=

In Delta ABC, cot ""(A)/(2) +cot""(B)/(2) + cot""(C)/(2)=

In Delta ABC, if cot""A/2,cot""B/2,cot""C/2 are in A.P. then a,b,c are In

AAKASH SERIES-PROPERTIES OF TRIANGLES-PRACTICE SHEET (EXERCISE-II) (LEVEL-II) (Straight Objective Type Questions)
  1. In a DeltaABC , "cot"(A)/(2)+"cot"+(B)/(2)+"cot"(C)/(2) is equal to

    Text Solution

    |

  2. In a triangle ABC if "cot"(A)/(2)"cot"(B)/(2)=c, "cot"(C)/(2)=a and "c...

    Text Solution

    |

  3. In Delta ABC, if cot""A/2: cot""B/2:cot ""C/2=1:4:15, then the greates...

    Text Solution

    |

  4. If a:b:c: =3:5:5 then "cot"(A)/(2)":cot"(B)/(2):"cot"(C)/(2)=

    Text Solution

    |

  5. In a DeltaABC,(a+b+c)(b+c-a)=lambdabc, then

    Text Solution

    |

  6. In a triangle ABC, (s-a)/11=(s-b)/12=(s-c)/13, then tan^2 (A//2)=

    Text Solution

    |

  7. In DeltaABC if a=(b-c)Sec theta then (2sqrt(bc))/(b-c)"Sin"(A)/(2)=

    Text Solution

    |

  8. Statement -I : In Delta ABC , b cos ^(2) "" ( C)/(2) + c cos ^(2) ""...

    Text Solution

    |

  9. In Delta ABC, if B=90^@ then tan""A/2=

    Text Solution

    |

  10. Assertion (A) : In Delta ABC if angle B = pi//2 then the diameter o...

    Text Solution

    |

  11. If cot ""(A)/(2) = 30 , Cot "" (B)/(2) = 50 , Cot "" ( C)/(2) = 70...

    Text Solution

    |

  12. In a triangle ABC=(1)/((a-b)(a-c))tan A//2+(1)/((b-c)(b-a))tanB//2+(1)...

    Text Solution

    |

  13. A triangular park is enclosed on two sides by a fence and on the third...

    Text Solution

    |

  14. If the hypotenuse of a right angled triangle is four times the length ...

    Text Solution

    |

  15. In a triangle ABC, two sides are a = 6, b = 3 and cos(A-B) =(4)/(5) th...

    Text Solution

    |

  16. If two sides of a triangle are 3 feet and 12 feet and included angle i...

    Text Solution

    |

  17. Given Delta^("le")ABC with AB=20,AC=22(1)/(2),BC=27, Points x and y ar...

    Text Solution

    |

  18. ABC is a right triangle with right angle at B, AC = 2. BC = 1 and BD i...

    Text Solution

    |

  19. A point P is inside an equilateral triangle. If the distances of P fro...

    Text Solution

    |

  20. Let POR be a triangle of area Delta with a = 2,b= (7)/(2) and c=(5)/(2...

    Text Solution

    |