Home
Class 11
MATHS
If a= 3, b=4, c= 5 then sin ""( A)/...

If a= 3, b=4, c= 5 then ` sin ""( A)/(2) = `

A

` (1)/(sqrt(10))`

B

` ( 2)/(sqrt(10 )) `

C

` ( 3)/(sqrt(10))`

D

` (4)/(sqrt(( 10 ))`

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= 3, b =4 , c = 5 then cos ""( A)/(2) =

If a=3,b =4,c= 5 ,then sin 2B is

If sin A : sin B : sin C = 3: 4: 5 then tan ""(A)/(2) : tan ""(B)/(2) : tan "" (C ) /(2) =

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

If cos A=3/4 then 32 "sin"A/2."sin"(5A)/2=

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

If A, B, C are the angles in a triangle then prove that sin .(A)/(2)+ sin . (B)/(2)+ sin .(C)/(2) =1 +4 sin((pi-A)/(4)) sin ((pi-B)/(4)) sin((pi-C)/(4))

If A , B , C are angles in a triangle , then prove that sin A + sin B + sin C =4 cos. (A)/(2) cos . (B)/(2) cos .(C)/(2)

AAKASH SERIES-PROPERTIES OF TRIANGLES-PRACTICE EXERCISE
  1. In Delta ABC , if a= 2b and A = 3B " then " A =

    Text Solution

    |

  2. In Delta ABC ( tan ""(A)/(2) - tan ""(B) /(2)) /( tan ""(A)/(2) +t...

    Text Solution

    |

  3. If a= 3, b=4, c= 5 then sin ""( A)/(2) =

    Text Solution

    |

  4. In DeltaABC , " find " b cos ^(2).(C)/(2)+c cos^(2).(B)/(2)

    Text Solution

    |

  5. (a+b+c)/( a+b+c) =

    Text Solution

    |

  6. If a= 5 , b-=12 , c=13 then tan ""(A)/(2) =

    Text Solution

    |

  7. If a= 3, b =4 , c = 5 then cos ""( A)/(2) =

    Text Solution

    |

  8. In Delta ABC , if a = 5 , b= 6 and c= 7 " then " cos ^(2) C //2 =

    Text Solution

    |

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

    Text Solution

    |

  10. Show that cot ""(A)/(2) + cot "" ( B)/(2) + cot "" ( C ) /(2)...

    Text Solution

    |

  11. ((a^(2))/( sin A)+( b^(2))/(sin B) + ( c^(2))/( sin C) ) ( sin ""(A)/...

    Text Solution

    |

  12. In Delta ABC ,(a+b+c) (tan ""(A)/(2) +tan ""(B)/(2) ) tan "" ( C) /...

    Text Solution

    |

  13. In Delta ABC , if c= (a+b) sin theta and cos theta = ( k sqrt (ab))...

    Text Solution

    |

  14. In Delta ABC , c cos ^(2) "" ( A)/(2) +a cos ^(2) "" ( C ) /(2) i...

    Text Solution

    |

  15. In Delta ABC , a sin ^(2) "" ( C ) /(2) + c sin ^(2) "" (A ) /(2) ...

    Text Solution

    |

  16. In Delta ABC , tan "" (A)/(2) , tan "" (B)/(2) are in H.P. A,b,c ...

    Text Solution

    |

  17. In Delta ABC , if (a)/( c ) = (sin (A-B))/( sin (B-C)) , " then " ...

    Text Solution

    |

  18. In Delta ABC , if cot "" (A)/(2) , cot "" ( B)/(2) , cot "" (C )/(2...

    Text Solution

    |

  19. In Delta , if cot "" (A)/(2) : cot : (B )/(2) : cot ""( C )/(2) =...

    Text Solution

    |

  20. In Delta ABC , if ( sin A)/(4) = (sin B)/(5) = (sin C)/( 6) then th...

    Text Solution

    |