Home
Class 11
MATHS
If b + c = 3a, then find the value of co...

If `b + c = 3a`, then find the value of `cot.(B)/(2) cot.(C)/(2)`

Promotional Banner

Topper's Solved these Questions

  • TRIGNOMETRIC FUNCTIONS

    NAGEEN PRAKASHAN ENGLISH|Exercise EXERCISES 3P|32 Videos

  • TRIGNOMETRIC FUNCTIONS

    NAGEEN PRAKASHAN ENGLISH|Exercise EXERCISES 3Q|21 Videos

  • TRIGNOMETRIC FUNCTIONS

    NAGEEN PRAKASHAN ENGLISH|Exercise EXERCISES 3N|42 Videos

  • STRAIGHT LINES

    NAGEEN PRAKASHAN ENGLISH|Exercise Exercise|207 Videos

Similar Questions

Explore conceptually related problems

If cos A=m cos B , then write the value of cot((A+B)/2)cot((A-B)/2dot)

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

if ABC is a triangle and tan(A/2), tan(B/2), tan(C/2) are in H.P. Then find the minimum value of cot(A/2)*cot(C/2)

If tanA-tan B=x , and cot B-cotA=y , then find the value of cot(A-B) .

If in A B C ,A C is double of A B , then the value of cot(A/2)cot((B-C)/2) is equal to 1/3 (b) -1/3 (c) 3 (d) 1/2

If in A B C ,A C is double of A B , then the value of (cot(A/2))(cot((B-C)/2)) is equal to 1/3 (b) -1/3 (c) 3 (d) 1/2

If tan A + cot A = 5, find the value of tan^2 A + cot^2 A .

If three sides a,b,c of a triangle ABC are in arithmetic progression, then the value of cot(A/2), cot(B/2), cot(C/2) are in

In DeltaABC, a = 3, b = 5, c = 6 , find the value of : cot (A/2)

If the sides a,b,c of a triangle are in Arithmetic progressioni then find the value of tan (A/2)+tan(C/2) in terms of cot(B/2)

NAGEEN PRAKASHAN ENGLISH-TRIGNOMETRIC FUNCTIONS-EXERCISES 3O
  1. In DeltaABC, prove that: 2[asin^(2)B/2+bsin^(2)A/2]=a+b-c

    Text Solution

    |

  2. In DeltaABC, prove that: (b+c-a)(cotB/2+cotC/2)=2acotA/2

    Text Solution

    |

  3. In DeltaABC, prove that: (b-c)/acos^(2)A/2+(c-a)/(b)cos^(2)B/2+(a-b)...

    Text Solution

    |

  4. In any triangle A B C , prove that: (b-c)cot (A/2)+(c-a)cot (B/2)+(a-b...

    Text Solution

    |

  5. In a DeltaABC the sides a, b and c are in AP. Evaluate (tan ""A/2+tan ...

    Text Solution

    |

  6. In a DeltaABC the sides a, b and c are in AP. Evaluate (tan ""A/2+tan ...

    Text Solution

    |

  7. If b + c = 3a, then find the value of cot.(B)/(2) cot.(C)/(2)

    Text Solution

    |

  8. In DeltaABC, if a,b,c are in A.P. prove that: cot(A/2),cot(B/2), cot...

    Text Solution

    |

  9. In DeltaABC, prove that: (a+b+c).(tan(A/2)+tan(B/2))=2c cot(C/2)

    Text Solution

    |

  10. In DeltaABC, prove that: cotA/2+cotB/2+cotC/2=(a+b+c)/(a+b-c)cotC/2

    Text Solution

    |

  11. In DeltaABC, a,b,c are in A.P., prove that: cotA/2.cotC/2=3

    Text Solution

    |

  12. Find the area of DeltaABC, if a=2, b=3 and c=5 cm

    Text Solution

    |

  13. Find the area of DeltaABC, if a=10cm, angleB=45^(@) and angleC=45^(@)

    Text Solution

    |

  14. Find the area of DeltaABC, if a=10cm, angleB=45^(@) and angleC=45^(@)

    Text Solution

    |

  15. In any A B C , prove that: =(a^2-b)/2dot(sinAsinB)/(sin(A-B))

    Text Solution

    |

  16. In a DeltaABC prove that cotA+cotB+cotC=(a^(2)+b^(2)+c^(2))/(4Delta)

    Text Solution

    |

  17. Prove that in DeltaABC, ((a+b+c)^(2))/(a^(2)+ b^(2)+c^(2))implies(co...

    Text Solution

    |

  18. In DeltaABC, prove that: s^(2).tan(A/2)tan(B/2)tan(C/2)=Delta

    Text Solution

    |

  19. In DeltaABC, prove that: abc. cosA/2.cosB/2.cosC/2=Deltas

    Text Solution

    |

  20. In DeltaABC, prove that: tanA/2.tanB/2.tanC/2=sqrt((1-a/s)(1-b/s)(1-...

    Text Solution

    |