Home
Class 14
MATHS
The sides a, b, c of a DeltaABC are in A...

The sides a, b, c of a `DeltaABC` are in AP and 'a' is the smallest side. What is cos A equal to?

A

`(3c-4b)/(2c)`

B

`(3c-4b)/(2b)`

C

`(3c-4b)/(2b)`

D

`(3b-4c)/(2c)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • PROPERTIES OF TRIANGLES

    PUNEET DOGRA|Exercise PREV YEAR QUESTION|30 Videos

  • PROBABILITY

    PUNEET DOGRA|Exercise PREV YEAR QUESTIONS|159 Videos

  • QUADRATIC EQUATIONS

    PUNEET DOGRA|Exercise PREV YEAR QUESTIONS|103 Videos

Similar Questions

Explore conceptually related problems

The sides a, b, c of a triangle ABC are in arithmetic progression and 'a' is the smallest side. What is cos A equal to ?

If the angle A,B,C of a DeltaABC are in A.P then

Angles A,B and C of a DeltaABC are in AP. If b/c =(sqrt3)/(sqrt2), then angleA is equal to

Sides of DeltaABC are in A.P. If a lt "min" {b,c} , then cos A may be equal to

If sides a,b,c of Delta ABC are in A.P., then : sin (A/2) cdot sin (C/2)/(sin (B/2) =

Sides of DeltaABC are in A.P. if a lt min {b,c} then cosA is equal to

The sides of a !ABC are in A.P. such that a lt minimum (b,c). Then , cos A may be equal to

If the lengths of the sides of a triangle are in AP and the greatest angle is double the smallest, then a ratio of lengths of the sides of this triangle is

If two angles of a DeltaABC are 45 ° and 60°, then the ratio of the smallest and greatest sides are

PUNEET DOGRA-PROPERTIES OF TRIANGLES -PREV YEAR QUESTION
  1. Consider a DeltaABC satisfying 2aSin^(2)((C)/(2))+2cSin^(2)((A)/(2))=2...

    Text Solution

    |

  2. Consider a DeltaABC satisfying 2aSin^(2)((C)/(2))+2cSin^(2)((A)/(2))=2...

    Text Solution

    |

  3. If in a triangle ABC, a=1+sqrt(3)cm,b=2 cm and angleC=60^(@) , then fi...

    Text Solution

    |

  4. In a DeltaABC, if a = 5, B=45^(@) and c=2sqrt(2), then b=

    Text Solution

    |

  5. Consider the following statements: I. There exists no DeltaABC for ...

    Text Solution

    |

  6. If the angles of a triangle are 30^(@) and 45^(@), and the included si...

    Text Solution

    |

  7. In any DeltaABC.a=18,b=24 and c=30, then what is SinC equal?

    Text Solution

    |

  8. The angles of a triangle are in AP and the least angle is 30^(@). What...

    Text Solution

    |

  9. In DeltaABC, if the angles A.B.C are in AP, which one of the following...

    Text Solution

    |

  10. If the sides of a triangle are 6cm, 10cm and 14cm, then what is the la...

    Text Solution

    |

  11. If sides of a triangle are in the ratio 2:sqrt6:1+sqrt3 the what is t...

    Text Solution

    |

  12. In a DeltaABC,a=8,b=10 and c=12. What is angleC equal?

    Text Solution

    |

  13. The sides a, b, c of a DeltaABC are in AP and 'a' is the smallest side...

    Text Solution

    |

  14. In a triangle ABC, if c=2, A=120^(@) and a=c then what is angle C equa...

    Text Solution

    |

  15. ABC is a triangle right angled at B. The hypotenuse (AC) is four times...

    Text Solution

    |

  16. ABC is a triangle right angled at B. The hypotenuse (AC) is four times...

    Text Solution

    |

  17. ABC is a triangle right angled at B. The hypotenuse (AC) is four times...

    Text Solution

    |

  18. ABC is a triangle right angled at B. The hypotenuse (AC) is four times...

    Text Solution

    |

  19. ABC is a triangle in which BC = 10 cm, CA = 6 cm and AB = 8 cm, Which ...

    Text Solution

    |

  20. In a triangle ABC. AC = 5 cm, AB = 7 cm, BC =sqrt39 what is the measu...

    Text Solution

    |