Home
Class 11
MATHS
In a Delta ABC if b+c = 3a then cot. (B)...

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

Promotional Banner

Topper's Solved these Questions

  • PERMUTATIONS AND COMBINATIONS

    ALLEN|Exercise All Questions|1 Videos

  • Solutions of Triangle & Binomial Theorem

    ALLEN|Exercise Do yourself -6|4 Videos

Similar Questions

Explore conceptually related problems

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

In a triangle ABC if b+c=3a then find the value of 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 Delta ABC, "cot"(A)/(2) + "cot" (B)/(2) + "cot" (C)/(2) is equal to

In a DeltaABC , 2 Delta (cot B + cot C)=

In any Delta ABC, prove the following : r_1=rcot(B/2)cot(C/2)

In any DeltaABC , prove that (a+b-c) cot (B/2) = (a-b+c) cot (C/2)

In Delta ABC , if a = 10 and b cot B + c cot C = 2(r + R) then the maximum area of DeltaABC will be

Prove that (b + c -a) (cot.(B)/(2) + cot.(C)/(2)) = 2a cot.(A)/(2)

ALLEN-SOLUTION AND PROPERTIES OF TRIANGLE-All Questions
  1. If in a triangle A B C angle B=90^0 then tan^2(A/2) is (b-c)/a (b) (b-...

    Text Solution

    |

  2. In a triangle A B C ,\ If (a^3+b^3+c^3)/(sin^3A+sin^3B+sin^3C)=343 , ...

    Text Solution

    |

  3. In a Delta ABC if b+c = 3a then cot. (B)/(2). cot. (C )/(2) has the va...

    Text Solution

    |

  4. If a/(sinA)=K , then the area of "Triangle ABC" in terms of K and sine...

    Text Solution

    |

  5. In a triangle A B C ,/c=60^0a n d/A=75^0 . If D is a point on A C such...

    Text Solution

    |

  6. In a ΔABC, a semicircle is inscribed, whose diameter lies on the side ...

    Text Solution

    |

  7. In a triangle A B C , right angled at B , then r=(A B+B C-A C)/2 b. r=...

    Text Solution

    |

  8. In triangle A B C where A ,\ B ,\ C are acute, the distances of the or...

    Text Solution

    |

  9. In a Delta ABC, show that (a cos A+b cos B+ c cos C)/(a+b+c)= (r )/(R...

    Text Solution

    |

  10. In an equilateral triangle, the inradius, circumradius, and one of the...

    Text Solution

    |

  11. Show that ((1)/(r (1))+ (1)/(r(2)))((1)/(r(2))+(1)/(r (3)))((1)/(r (3)...

    Text Solution

    |

  12. In a triangle A B C ,(r1+r2)/(1+cosC) is equal to (2a b)/(c"Delta") (b...

    Text Solution

    |

  13. With usual notations in a triangle A B C , if r1=2r2=2r3 then 4a=3b (b...

    Text Solution

    |

  14. If r1,\ r2a n d\ r3 be the radii of excircles of the triangle A B C , ...

    Text Solution

    |

  15. a,b,x are in A.P., are in G.P. and a, b, z are in H.P. then:

    Text Solution

    |

  16. In A B C , if r\ : r1: R=2\ : 12\ :5, where all symbols have their us...

    Text Solution

    |

  17. If a,b A be given in a triangl and c(1) and c(2) two possible values o...

    Text Solution

    |

  18. If A , B , C are angles of a triangle which of the following will not ...

    Text Solution

    |

  19. In a A B C , S/R is equal to s in A+s in B+s in C (b) 4cosA/2cosB/2co...

    Text Solution

    |

  20. If cos A+cos B+2cos C=2 then the sides of the A B C are in (a)A.P. (b...

    Text Solution

    |