Home
Class 11
MATHS
In Delta ABC , " if " a = 2, b = 3 " and...

In `Delta ABC , " if " a = 2, b = 3 " and " sin A = 2/3 `. Then , cos C is equal to

A

`1/2`

B

`2/3`

C

`2/sqrt13`

D

`1/sqrt13`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • 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 LECTURE SHEET EXERCISE - I (Matrix Matching Type Questions)|1 Videos

  • PROPERTIES OF TRIANGLES

    AAKASH SERIES|Exercise PRACTICE EXERCISE|132 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

In Delta ABC , if a= 2, b= 3 , c=4 then cos A =

In Delta ABC , if a: b: c = 3: 4:5 then sin A : sin B : sin C =

In Delta ABC, sum a^3 sin (B-C) =

In Delta ABC , if the sides are a = 3, b = 5 and c = 4 , then sin . B/2 + cos . B/2 is equal to

In a Delta ABC , ir r_1 = 2r_2 = 3r_3 " then " (a)/(b) + ( b)/( c ) + (c )/(a) is equal to

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

In Delta ABC " if " 3 sin A = 6 sin B = 2 sqrt3 sin C , " then " angle A =

In Delta ABC if a: b: c = 3 : 5: 7 , then , cos A + cos B =

In Delta ABC, if cos A cos B+ sin A sin B sin C=1 , then a:b:c =

AAKASH SERIES-PROPERTIES OF TRIANGLES-LECTURE SHEET EXERCISE - I ( Straight Objective Type Questions )
  1. A triangle has base 10 and base angles are 50, 70If the perimeter of t...

    Text Solution

    |

  2. The side of triangle ABC satisfy the relation a + b - c = 2 " and " 2a...

    Text Solution

    |

  3. In Delta ABC , " if " a = 2, b = 3 " and " sin A = 2/3 . Then , cos C ...

    Text Solution

    |

  4. O is the circumcentre of the triangle ABC and R(1), R(2), R(3) are th...

    Text Solution

    |

  5. If b = 20 , c = 21 ," and " sin A = 3/5 then a =

    Text Solution

    |

  6. If the sides of a triangle are 4 cm, 5 cm, 6 cm then ratio of the cosi...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  9. In a Delta ABC , if D is the mid point of BC and AD is perpendicular ...

    Text Solution

    |

  10. The base of a triangle is 80 and one of base angle is 60^(@) . If the...

    Text Solution

    |

  11. If the sides of a triangle are in A.P and greatest angle exceeds the l...

    Text Solution

    |

  12. If D is mid point of the side BC of a triangle ABC and AD is perpendic...

    Text Solution

    |

  13. Two circles of radii a and b cut each other at an angle theta then len...

    Text Solution

    |

  14. In the given figure, AB is the diameter of the circle centered at O. I...

    Text Solution

    |

  15. In triangle ABC, D is mid point of BC, if 'AD' is perpendicular to 'AC...

    Text Solution

    |

  16. With usual notation , if in triangle ABC, (b + c)/11 = (c + a)/12 = (...

    Text Solution

    |

  17. The sides of a triangle are three consecutive natural numbers and its ...

    Text Solution

    |

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

    Text Solution

    |

  19. Let ABC be a triangle such that angle ACB = pi//6 and c denote the le...

    Text Solution

    |

  20. If the lengths of the sides of triangle are 3, 5, and 7, then the larg...

    Text Solution

    |