Home
Class 12
MATHS
IN triangleABC, (cosC+cosA)/(c+a)+(cosB)...

IN `triangleABC, (cosC+cosA)/(c+a)+(cosB)/(b)=`

A

`(1)/(a)`

B

`(1)/(b)`

C

`(1)/(c )`

D

`(c+a)/(b)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC FUNCTIONS

    TARGET PUBLICATION|Exercise Evaluation Test|34 Videos

  • TRIGONOMETRIC FUNCTIONS

    TARGET PUBLICATION|Exercise Critical Thinking|88 Videos

  • THREE DIMENSIONAL GEOMETRY

    TARGET PUBLICATION|Exercise Evaluation Test|9 Videos

  • VECTORS

    TARGET PUBLICATION|Exercise Evaluation Test|18 Videos

Similar Questions

Explore conceptually related problems

In triangleABC, a cosB-b cosA=

In triangleABC, (b+c)cosA+(c+a)cosB+(a+b)cosC=

In triangleABC, (cosA)/(c cosB+bcosC)+(cosB)/(acosC+ccosA)+(cosC)/(acosB+bcosA)=

In triangleABC, 2(bc cosA+ac cosB+ab cosC)=

If in a triangle ABC, (cosA)/a=(cosB)/b=(cosC)/c ,then the triangle is

If in a triangle ABC , 2(cosA)/a+(cosB)/b+2(cosC)/c=a/(bc)+b/(ca) , then the value of the angle A, is

In triangle ABC, 2(bc cosA-ac cosB-ab cosC)=

Prove that in a triangle ABC, (cosB-cosC)/(cosA+1) =(c-b)/a

If an a triangle A B C ,(2cosA)/a+(cosB)/b+(2cosC)/c=a/(b c)+b/(a c), find the /_A= 90^0 (b) 60^0 (c) 30^0 (d) none of these

If in DeltaABC,(cosA)/(a)=(cosB)/(b)=(cosC)/(c) and side a=2, then the area of the triangle is

TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Competitive Thinking
  1. In triangleABC, (b+c)cosA+(c+a)cosB+(a+b)cosC=

    Text Solution

    |

  2. In DeltaABC,cosecA(sinBcosC+cosBsinC)=

    Text Solution

    |

  3. IN triangleABC, (cosC+cosA)/(c+a)+(cosB)/(b)=

    Text Solution

    |

  4. In DeltaABC, with usual notations, if a,b,c are in AP then acos^(2)((C...

    Text Solution

    |

  5. In a DeltaABC, if 2s=a+b+cand(s-b)(s-c)=xsin^(2).(A)/(2), then x =

    Text Solution

    |

  6. In triangle ABC, sin((A)/(2))sin((C)/(2))=sin((B)/(2)) and '2s' is the...

    Text Solution

    |

  7. In triangleABC, if a=18, b=24, c=30, then cos((A)/(2))=

    Text Solution

    |

  8. In DeltaABC,(a-b)^(2)cos^(2).(C)/(2)+(a+b)^(2)sin^(2).(C)/(2)=

    Text Solution

    |

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

    Text Solution

    |

  10. In DeltaABC,tan.(A)/(2)+tan.(B)/(2)=

    Text Solution

    |

  11. In DeltaABC,(cot.(A)/(2)+cot.(B)/(2))(asin^(2).(B)/(2)+bsin^(2).(A)/(2...

    Text Solution

    |

  12. If the sides of a triangle are in A.P., then the cotangent of its half...

    Text Solution

    |

  13. If c^(2)=a^(2) +b^(2), then 4s(s-a)(s-b)(s-c) is equal to

    Text Solution

    |

  14. The area of an isosceles triangle is 9 cm^(2). If the equal sides are ...

    Text Solution

    |

  15. The area of the triangle ABC,in which a=1,b=2angleC=60^(@) is

    Text Solution

    |

  16. In DeltaABC,"if "a=1,b=2,angleC=60^(@),"then "4Delta^(2)+c^(2)=

    Text Solution

    |

  17. In triangleABC, a^(2) sin2C + c^(2) sin2A=

    Text Solution

    |

  18. If the area of a triangle ABC is given by Delta=a^(2)-(b-c)^(2), then ...

    Text Solution

    |

  19. Let PQR be a triangle of area Delta with a = 2, b = 7/2 and c =5/2, wh...

    Text Solution

    |

  20. If in a triangle ABC, b=sqrt3, c=1 and B-C-90^0, then angle A is

    Text Solution

    |