Home
Class 11
MATHS
If A = 60 ^(@) " then " ( 1)/(a+b) + ...

If ` A = 60 ^(@) " then " ( 1)/(a+b) + (1) /( a+ c) = `

A

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

B

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

C

`(3)/( a- b- c) `

D

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

Text Solution

Verified by Experts

The correct Answer is:
A
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

If A= 60 ^(@) " then " ( b) / ( c+ a) + ( c ) /( a+ b) =

If C = A - B = 60 ^(@) " then " (a-b)/ (c )=

If C= 60 ^(@) " then " ( a) /( b+ c) + ( b) /( c+a) =

In Delta ABC , if angle A = 60 ^(@) then ( 1+ (a)/(c ) +(b) /(c ) ) (1+ ( c )/( b) - (a)/(b)) =

If C = 60 ^(@) " then "= ( b)/( c^(2) -a^(2)) + ( a) /( c^(2)- b^(2)) =

If = 60 ^(@) , B= 30 ^(@) " then " a: b: c

In a Delta ABC , " if " A = 60^(@) , then the value of (1 + a/c + b/c)(1 + c/b - a/b) =

If C=60^(@), " then show that"(a)/(b+c)+(b)/(c+a)=1

AAKASH SERIES-PROPERTIES OF TRIANGLES-PRACTICE EXERCISE
  1. If sides of a triangles are in the ratio x: y : sqrt( x^(2) +xy + y...

    Text Solution

    |

  2. If a:b: c = 3: 5: 7 then cos A : cos B : cos C

    Text Solution

    |

  3. If A = 60 ^(@) " then " ( 1)/(a+b) + (1) /( a+ c) =

    Text Solution

    |

  4. In Delta ABC if a =2, b= 3, c = 4 then cos A + cos B + cos C =

    Text Solution

    |

  5. In Delta ABC , 2ac sin ""( 1)/(2) (A-B+C)=

    Text Solution

    |

  6. The sides of a triangles are x^(2) +3x + 3, 2x+ 3 and x^(2) + 2x th...

    Text Solution

    |

  7. In Delta ABC , if c^(4) - 2 (a^(2) + b^(2) ) c^(2) + a^(4) +a^(2)...

    Text Solution

    |

  8. In triangle ABC , a = 4, b = 3 and angle A = 60^(@) . Then c is root...

    Text Solution

    |

  9. The roots of x^(2) - 2 sqrt 3 x+ 2=0 represent two sides of a tria...

    Text Solution

    |

  10. (c- b cos A )/( b - c cos A ) =

    Text Solution

    |

  11. ( b+c) cos A + ( c+a) cos B +( a+b) cos C =

    Text Solution

    |

  12. In Delta ABC , if a( b cos C + c cos B ) = 2ka^(2) , then k=

    Text Solution

    |

  13. In Delta ABC , if A,B , C are in A.P. The (a+c)/( sqrt(a^(2) -ac + ...

    Text Solution

    |

  14. InDelta ABC , a( b cos C - c cos B) =

    Text Solution

    |

  15. In Delta ABC , (sin A(a- b cos C))/( sin C ( c-b cos A)) =

    Text Solution

    |

  16. If a,b,c are in A.P. Then cos "" ( A-C)/( 2) cosec ""(B)/(2) =

    Text Solution

    |

  17. In Delta ABC , b = sqrt 3+ 1 , c sqrt3-1 and angle A = 60 ^(@) the...

    Text Solution

    |

  18. If C = A - B = 60 ^(@) " then " (a-b)/ (c )=

    Text Solution

    |

  19. In Delta ABC , if tan ""( A)/(2) = t cot ""(( B- C)/( 2)) , " the...

    Text Solution

    |

  20. In Delta ABC, if a = 6, b=3 and cos (A-B) = (4)/(5) " then " ang...

    Text Solution

    |