Home
Class 12
MATHS
In a Delta A B C, if b+c=3a ,then cot(...

In a ` Delta A B C`, if `b+c=3a` ,then `cot(B/2)dotcot(C/2)` has the value equal to:

A

4

B

3

C

2

D

1

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SOLUTION OF TRIANGLE

    MOTION|Exercise EXERCISE - 2 (LEVEL I)|25 Videos

  • SOLUTION OF TRIANGLE

    MOTION|Exercise EXERCISE - 2 (LEVEL II)|6 Videos

  • SOLUTION OF TRIANGLE

    MOTION|Exercise EXERCISE - 4( LEVEL II)|10 Videos

  • SEQUENCE & SERIES

    MOTION|Exercise Exercise -4 Level -II Previous Year /JEE Advanced|22 Videos

  • STRAIGHT LINE

    MOTION|Exercise Exercise 4 Lelvel -II|7 Videos

Similar Questions

Explore conceptually related problems

In a hat grad ABC if b+c=3a, then cot (B)/(2). cot (C)/(2) has the value equal to: 4 b.3 c.2d.1

If, in Delta ABC, 3a = b + c then: cot (B/2) cdot cot (C/2) = .....

In /_ABC, if 3a=b+c, then cot((B)/(2))cot((C)/(2))=

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

If in a triangle ABC ,b +c=4a then cot(B/2)cot(C/2) is equal to

If in a triangle ABC, b + c = 3a, then tan (B/2)tan(C/2) is equal to

In a triangle ABC,/_A=60^(@) and b:c=(sqrt(3)+1):2 then (/_B-/_C) has the value equal to

In a triangle ABC if b+c=3a then find the value of cot((B)/(2))cot((C)/(2))

In triangle ABC, if cot A*cot C=(1)/(2)andcot B*cot C=(1)/(18) then the value of tan C is

MOTION-SOLUTION OF TRIANGLE-EXERCISE -1
  1. In a DeltaABC, (bc sin^2A)/(cos A + cos B cosC)is equal to

    Text Solution

    |

  2. If R denotes the circum-radius of a Delta ABC, then (b^(2)-c^(2))/(2aR...

    Text Solution

    |

  3. In a Delta A B C, if b+c=3a ,then cot(B/2)dotcot(C/2) has the value ...

    Text Solution

    |

  4. In triangle ABC, (b-c)sin A+(c-a) sin B+( a-b) sin C=

    Text Solution

    |

  5. In a Delta ABC, the value of (a cosA+b cosB+c cosC)/(a+b+c) is equal t...

    Text Solution

    |

  6. If, in a triangleABC, (a+b+c)(b+c-a)=kbc, then k lies in the interval

    Text Solution

    |

  7. In any DeltaABC, 2 (bc cos A + ca cos B + ab cos C) =

    Text Solution

    |

  8. In a A B C if b=2,c=sqrt(3) and /A=pi/6 , then value of R is equal to

    Text Solution

    |

  9. The distance between the middle point of BC and the foot of the perpen...

    Text Solution

    |

  10. In DeltaABC, if AB=5cm, BC=13cm and CA=12cm, then the distance to vert...

    Text Solution

    |

  11. In triangle ABC , prove that (b+c)cos A +(c+a)cos B +(a+b)cos C=a+b+c.

    Text Solution

    |

  12. (b-c)/acos^2 (A/2)+(c-a)/bcos^2(B/2)+(a-b)/c cos^2(C/2)=

    Text Solution

    |

  13. Prove that bc cos^(2).(A)/(2) + ca cos^(2).(B)/(2) + ab cos^(2).(C)/(2...

    Text Solution

    |

  14. In a triangleABC, [tan(A/2) tan(C/2)] is equal to

    Text Solution

    |

  15. In A B C , the median A D divides /B A C such that /B A D :/C A D=2:1...

    Text Solution

    |

  16. If the median AD of triangle ABC makes an angle pi/4 with the side BC,...

    Text Solution

    |

  17. In a DeltaABC, A=(2pi)/3, b-c=3sqrt3 cm and area(DeltaABC)=(9sqrt3)/2 ...

    Text Solution

    |

  18. If the area of triangleABC is triangle =a^(2) -(b-c)^(2), then: tanA =

    Text Solution

    |

  19. If the sides of a triangles are 3:7:8, then ratio R:r

    Text Solution

    |

  20. In a right angled triangle R is equal to

    Text Solution

    |