Home
Class 11
MATHS
If A+B+C=180^(@), then the value of cot....

If `A+B+C=180^(@)`, then the value of `cot.(A)/(2)+cot.(B)/(2)+cot.(C)/(2)` will be

A

`2 cot ""A/2 cot ""B/2 cot""C/2`

B

`4 cot ""A/2 cot ""B/2 cot ""C/2`

C

`cot ""A/2 cot ""B/2 cot ""C/2`

D

`8 cot ""A/2 cot ""B/2 cot ""C/2`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • FACTORIZATION FORMULAE

    TARGET PUBLICATION|Exercise EVALUATION TEST|8 Videos

  • FACTORIZATION FORMULAE

    TARGET PUBLICATION|Exercise CRITICAL THINKING|34 Videos

  • CIRCLE AND CONICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|28 Videos

  • PROBABILITY

    TARGET PUBLICATION|Exercise EVALUATION TEST|8 Videos

Similar Questions

Explore conceptually related problems

In a DeltaABC, "the value of"cot""(A)/(2)cot""(B)/(2)cot""(C)/(2)is

If A+B+C=180^(@) then the value of (cot B+cot C)(cot C+cot A)(cot A+cot B) will be

In a DeltaABC,a-2b+c=0 , then the value of Cot((A)/(2))Cot((C)/(2))

If A+B+C=pi, then find the minimum value of cot^(2)A+cot^(2)B+cot^(2)C

If A+B+C=180^(@) then sum cot A cot B is

If A+B+C=180^(@), then cot A+cot B+cot Ccot A cot B cot C

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

In a triangle ABC, if r^(2)cot((A)/(2))cot((B)/(2))cot((C)/(2))=

If a,b,c are in A.P then cot((A)/(2)),cot((B)/(2)),cot((C)/(2)) are in

TARGET PUBLICATION-FACTORIZATION FORMULAE-COMETITIVE THINKING
  1. If cos x=3, cos y, then 2 tan ((y-x)/(2))=

    Text Solution

    |

  2. If cosA=mcosB, then

    Text Solution

    |

  3. The sum S= sin theta + sin 2 theta + …+ sin n theta, equals

    Text Solution

    |

  4. cos.(2pi)/(7)+cos.(4pi)/(7)+cos.(6pi)/(7)

    Text Solution

    |

  5. If cosA=3/4, then 32 sin, A/2 sin, (5A)/2= (A) sqrt(11) (B) -sqrt(11) ...

    Text Solution

    |

  6. sin 12^(@) sin 48^(@) sin 54^(@) is equal to

    Text Solution

    |

  7. sin12^@sin24^@sin48^@sin84^@=

    Text Solution

    |

  8. (1+cos.(pi)/(8))(1+cos.(3pi)/(8))(1+cos.(5pi)/(8))(1+cos.(7pi)/(8)) is...

    Text Solution

    |

  9. If mtan(theta-30^0)=ntan(theta+120^0) then (m+n)/(m-n) is equal to

    Text Solution

    |

  10. The vlaue of cos^(2)76^(@)+cos^(2)16-cos76^(@)cos16^(@),is

    Text Solution

    |

  11. 2 sin ^(2) beta + 4 cos (alpha + beta) sin alpha sin beta + cos 2 (alp...

    Text Solution

    |

  12. In triangle ABC, the value of sin 2A + sin 2B+ sin 2C is equal to

    Text Solution

    |

  13. If A+B+C=pi and cosA=cosBcosC then tanBtanC is equal to

    Text Solution

    |

  14. If A,B ,C are the angle of Delta ABC then cot A .cot B + c...

    Text Solution

    |

  15. If A+B+C=180^@ then the value of (cotB+cotC)(cotC+cotA)(cotA+cotB) wil...

    Text Solution

    |

  16. If A+b+C=pi then (tanA+tanB+tanC)/(tanAdota n BdottanC)

    Text Solution

    |

  17. In a triangle ABC angle A=pi/2 then cos^2B+cos^2C=

    Text Solution

    |

  18. If A+B+C=180^(@), then the value of cot.(A)/(2)+cot.(B)/(2)+cot.(C)/(2...

    Text Solution

    |

  19. Let A, B and C are the angles of a plain triangle and tan(A/2)=1/3...

    Text Solution

    |

  20. In any triangle ABC. sin ^(2) ""A/2 + sin ^(2) ""B/2 + sin ^(2) ""C/2 ...

    Text Solution

    |