Home
Class 11
MATHS
Cot A +Cot B +cot C =...

` Cot A +Cot B +cot C = `

A

` ( a^(2) +b^(2) +c^(2))/( 2Delta) `

B

` ( a^(2) +b^(2) +c^(2))/( 4Delta) `

C

` ( a +b +c)/( 3Delta) `

D

` ( a^(2) +b^(2) +c^(2))/( 3Delta) `

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • PROPERTIES OF TRIANGLES

    AAKASH SERIES|Exercise LECTURE SHEET EXERCISE - I ( Straight Objective Type Questions ) |58 Videos

  • PROPERTIES OF TRIANGLES

    AAKASH SERIES|Exercise LECTURE SHEET EXERCISE - I (More than One correct answer Type Questions) |4 Videos

  • PROPERTIES OF TRIANGLES

    AAKASH SERIES|Exercise EXERCISE - II|148 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

Statement I : If A+B+C=pi (A,B,C gt 0) and the angle C is obtuse then tan A tan B lt 1 . Statement II : If A, B, C are acute positive angles such that A+B+C=pi and cot A cot B cot C = K then K le (1)/(3sqrt(3)) Which of the above statements is correct ?

In Delta ABC Prove that a cot A + b cot B + c cot C = 2 ( R + r)

( a cot A + b cot B + c cot C )/( a + b+ c)

If A+B+C=0 , then cot A cotB + cot B cot C+ cot C cot A =

In an acute angled triangle, cot B cot C + cot A cot C + cot A cot B

In an acute angled triangle, cot B cot C + cot A cot C + cot A cot B

If Delta ABC , if cot A/2 , cot B/2 : cot C/2 = 4:3:2 , then a : b : c =

If cot A/2: cot B/2: cot C/2 = 3:5:7 . Then show that a:b:c = 6:5:4 (In /_\ABC ).

Show that (cot A + tan B) / (cot B + tan A) = cot A. tan B.

AAKASH SERIES-PROPERTIES OF TRIANGLES-PRACTICE EXERCISE
  1. In Delta ABC , if ( sin A)/(4) = (sin B)/(5) = (sin C)/( 6) then th...

    Text Solution

    |

  2. In Delta ABC , if a: b: c = 3: 4:5 then sin A : sin B : sin C =

    Text Solution

    |

  3. Cot A +Cot B +cot C =

    Text Solution

    |

  4. If 4,5 are two sides of a triangle and included angle 60 ^(@) , ...

    Text Solution

    |

  5. Area of triangle is 75 cm^(2) and two of its sides 20 cm, 15cm ,t...

    Text Solution

    |

  6. IF 13,14,15 are the sides of the triangle , then the area of the trian...

    Text Solution

    |

  7. If the sides of a triangle are 5, 7, 8 then its area is

    Text Solution

    |

  8. If the area of Delta ABC with sides a,b,c is Delta, then the are...

    Text Solution

    |

  9. Two angles of a triangles are (pi)/(6) and (pi)/(4) included si...

    Text Solution

    |

  10. If in Delta ABC, b-c = 3sqrt3 , A= 120 ^(@) and the area of Delt...

    Text Solution

    |

  11. In Delta ABC , ( bc cos A + c a cos B + ab cos C) /( cot A + cot B ...

    Text Solution

    |

  12. If a = 5, b= 12 ,c = 13 then R =

    Text Solution

    |

  13. If a cos A = b cos B then triangle ABC is

    Text Solution

    |

  14. In Delta ABC , sum a (sin B - sin C)

    Text Solution

    |

  15. In Delta ABC, sum a .sin (B-C)=

    Text Solution

    |

  16. In Delta , sum a^(3) sin (B-C) =

    Text Solution

    |

  17. In Delta ABC , R^(2) ( sin 2A +sin 2B+ sin 2C) =

    Text Solution

    |

  18. If alpha, beta , gamma are the lengths of the altitudes of Delta A...

    Text Solution

    |

  19. If p1,p2,P3 are the lengths of the altitudes from the vertices of...

    Text Solution

    |

  20. If p1, p2, p3 are the lengths of the altitudes from the vertices...

    Text Solution

    |