Home
Class 11
MATHS
In /\ABC, if a = 3. b = 5 and c =7, show...

In `/_\ABC`, if a = 3. b = 5 and c =7, show that the triangle is obtused.

Promotional Banner

Topper's Solved these Questions

  • MODEL QUESTION PAPERS-SET 2

    UNITED BOOK HOUSE|Exercise EXERCISE|48 Videos

  • MODEL QUESTION PAPERS-SET 4

    UNITED BOOK HOUSE|Exercise EXERCISE|47 Videos

Similar Questions

Explore conceptually related problems

If in a triangle ABC, a=3, b=5 and c=7, show that the triangle is obtuse angled.

In the triangle ABC, if cos 3 A + cos 3B+ cos 3C=1 , show that the triangle is obtuse-angled.

In /_\ABC . if b cos A -a cos B = 0, show that the triangle isosceles.

In a triangle ABC, the sides are 6cm, 10 cm and 14 cm. Show that the triangle is obtuse-angled with the obtuse angle equal to 120^@ .

In any triangle ABC, if cosA + cos B + cosC =3/2 , then show that the triangle is equilateral.

If in triangleABC a=3cm, b=5cm and c=7cm then the triangle is

In triangle ABC, if a=3, b=5 and c=120^(@) , state which of the following is the value of c?

In any triangle ABC, if sin^(2)A + sin^(2)B + sin^(2)C = 9/4 , show that the triangle is equilateral.

If in a triangle ABC, cos^(2)A + cos^(2)B + cos^(2)C =1 , then show that the triangle is right angled.

In triangle ABC, If cos B= a/(2c) , then the triangle is-

UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 3-EXERCISE
  1. If the realtion R defined as the set S = {1.-2, 3, 4},,AA,a,b in s,aRb...

    Text Solution

    |

  2. Show that sectheta+tantheta=tan(pi/4+theta/2)

    Text Solution

    |

  3. In /\ABC, if a = 3. b = 5 and c =7, show that the triangle is obtused.

    Text Solution

    |

  4. If | z + 2 | + | z - 2 | le 6, find the maximum value of I z I.

    Text Solution

    |

  5. If m=^nC2show that ^mC2=3^(n+1)C4

    Text Solution

    |

  6. If a+b=3,then show that the minimum value of |a+ib|=is 3/sqrt2

    Text Solution

    |

  7. Find the sum of the following infinite G.P series 0.9+0.81+0.792+….

    Text Solution

    |

  8. Show that the distance between (1,-1) and ((2m^2)/(1+m^2),(1-m)^2/(1+m...

    Text Solution

    |

  9. Find the radius of sphere passing through (2,0,1) and having centre(0,...

    Text Solution

    |

  10. Prove that lim(xrarroo)(1+1/x)^x=e

    Text Solution

    |

  11. For all real values of x and y, if f(x+y)=f(x)f(y), f(5)=4, f'(0)=2, f...

    Text Solution

    |

  12. IfP(A)=1/2,P(B)=1/3)and P(A capB)=1/4find (A 'capB')

    Text Solution

    |

  13. In.an examination. 50%of the condidates have passed in mathematics 50%...

    Text Solution

    |

  14. If A,B,(A - B)are positive acute angles, then prove that geometrically...

    Text Solution

    |

  15. Show thatcos((2pi)/7)+cos((4pi)/7)+cos((6pi)/7)=-1/2

    Text Solution

    |

  16. Show that a^6+a^4+a^2+1=0,when a=1/sqrt2(1+i)

    Text Solution

    |

  17. Prove by mathematical induction:(3^(4n+1)+2^(2n+2))is divisible by 7.

    Text Solution

    |

  18. Show that the co-efficient of the middle term of the expansion of(1+x)...

    Text Solution

    |

  19. If (y/z)^a.(z/x)^b.(x/y)^c=1and a,b,c are in A.P ,show that x,y,z are ...

    Text Solution

    |

  20. In /\XYZthe equation of the perpendicularbisector of XY and XZ arc x-y...

    Text Solution

    |