Home
Class 12
MATHS
In an isosceles triangle with base angle...

In an isosceles triangle with base angle `alpha` and lateral side 4, Rr=

A

`8 cos alpha`

B

`(8 cos alpha)/(1- cos alpha)`

C

`(8 cos alpha)/(1+ cos alpha)`

D

`8 cos alpha- (1- cos alpha)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SOLUTION OF TRIANGLE

    MOTION|Exercise EXERCISE - 2 (LEVEL II)|6 Videos

  • SOLUTION OF TRIANGLE

    MOTION|Exercise EXERCISE - 3|33 Videos

  • SOLUTION OF TRIANGLE

    MOTION|Exercise EXERCISE -1|36 Videos

  • SEQUENCE & SERIES

    MOTION|Exercise Exercise -4 Level -II Previous Year /JEE Advanced|22 Videos

  • STRAIGHT LINE

    MOTION|Exercise Exercise 4 Lelvel -II|7 Videos

Similar Questions

Explore conceptually related problems

In an Isosceles triangle the base angles are equal and the vertex angle is twice of each base angle. Find the measures of the angles of the triangle.

If in an isosceles triangle with base ' ' ' vertical angle 20^(@) and lateral side each of length 'b' is given then value of a^(3)+b^(3) equals

In an isosceles triangle,the base angles are equal.The vertex angle is 40^(@) What are the base angles of the triangle?

In an isosceles triangle,the base angles are equal.The vertex angle is twice of either base In an isosceles triangles of the triangle?

In an isosceles triangle,the base angles are equal.The vertex angle is thrice either base angle. What are the measures of the angles?

Show that in an isosceles triangle, the angles opposite to the equal sides are equal.

Find the area of an isosceles triangle having the base xcm and one side ycm

MOTION-SOLUTION OF TRIANGLE-EXERCISE - 2 (LEVEL I)
  1. In a DeltaABC, If A=30^@,b=2,c=sqrt3+1, then (C-B)/2 is

    Text Solution

    |

  2. cot (A+B)/2.tan(A-B)/2= (a) (a+b)/(a-b) (b) (a-b)/(a+b)

    Text Solution

    |

  3. In any triangle ABC,1-tan(A/2)tan(B/2)=

    Text Solution

    |

  4. In a triangleABC, if 3tan (A/2) tan (C /2)=1, then sides a,b,c are in

    Text Solution

    |

  5. If, in Delta ABC, a = 16, b = 24, c = 20, then : sin (A/2)= ....

    Text Solution

    |

  6. In triangleABC, (b+a-c)tan((A)/(2))=

    Text Solution

    |

  7. If, in Delta ABC, a = 2x, b = 2y and C = 120^(@) then the area of the ...

    Text Solution

    |

  8. If the median AD of triangle ABC divides the angle BAC in the ratio 1:...

    Text Solution

    |

  9. In a triangle ABC , let angleC=(pi)/2. If r is the in-radius and R is ...

    Text Solution

    |

  10. In an isosceles triangle with base angle alpha and lateral side 4, Rr=

    Text Solution

    |

  11. If I is the incentre of a triangle whose is radius and circumradius ar...

    Text Solution

    |

  12. AD, BE and CF are the medians of triangle ABC whose centroid is G. If ...

    Text Solution

    |

  13. Let 'l' is the length of median from the vertex A to the side BC of a ...

    Text Solution

    |

  14. If in a /\ ABC the altitude from the vertices A,B,C on opposite side a...

    Text Solution

    |

  15. If the radius of the circum-circle of an isosceles triangle PQR is equ...

    Text Solution

    |

  16. In a triangle ABC, if a=2,b=4,c=5 then cosA=

    Text Solution

    |

  17. If in a triangle ABC a,b,c are roots of the equation x^3 - 11 x^2 + 38...

    Text Solution

    |

  18. In a triangle A+B+C=90 then prove that cotA+cotB+cotC=cotAcotBcotC

    Text Solution

    |

  19. If cos A=(sinB)/(2 sin C), then triangleABC is

    Text Solution

    |

  20. Let A, B and C are the angles of a plain triangle and tan(A/2)=1/3...

    Text Solution

    |