Home
Class 12
MATHS
If veca+vecb+vec c=vec0 and |veca|=3,|ve...

If `veca+vecb+vec c=vec0` and `|veca|=3,|vecb|=5` and `|vec c|=7`, then the cosine of the angle between the vectors `veca` and `vecb` is -

A

`(3)/(5)`

B

`(1)/(2)`

C

`-(1)/(2)`

D

`-(3)/(5)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • MCQ ZONE

    CHHAYA PUBLICATION|Exercise Question Paper 4|80 Videos

  • MCQ ZONE

    CHHAYA PUBLICATION|Exercise Question Paper 6|80 Videos

  • MCQ ZONE

    CHHAYA PUBLICATION|Exercise Question Paper 2|80 Videos

  • MAXIMA AND MINIMA

    CHHAYA PUBLICATION|Exercise Sample Questions for Competitive Examination E|2 Videos

  • MCQ ZONE 3

    CHHAYA PUBLICATION|Exercise Question Paper 8|30 Videos

Similar Questions

Explore conceptually related problems

If |veca|=4,|vecb|=2 sqrt3 and |vecaxxvecb|=12 then the angle between the vectors veca and vecb is

If vec a,vec b, vec c be three vectors such that vec a+vec b+vec c=0 , |veca|=3 , |vecb|=5 and |vecc|=7 find the angle between the vectors veca and vec b .

If veca +vecb +vecc=0, |veca|=3,|vecb|=5, |vecc|=7 , then find the angle between vecb and vecc .

If veca and vecb are two vectors, such that veca.vecbgt0 and |veca.vecb|=|vecaxxvecb| then the angle between the vectors veca and vecb is

veca+vecb+vecc=vec0, |veca|=3, |vecb|=5,|vecc|=9 ,find the angle between veca and vecc .

If |veca| = sqrt3,|vecb| = 2 and veca.vecb = sqrt6 , then find the angle between veca and vecb .

If |vecaxxvecb|=veca*vecb , then what is the angle between veca and vecb ?

If veca, vecb and vecc are such that [veca \ vecb \ vecc] =1, vecc= lambda (veca xx vecb) , angle between vecc and vecb is 2pi//3 , |veca|=sqrt2, |vecb|=sqrt3 and |vecc|=1/sqrt3 then the angle between veca and vecb is

If veca+vecb=vecc , and a+b=c then the angle between veca and vecb is

CHHAYA PUBLICATION-MCQ ZONE -Question Paper 3
  1. The area of the parallelogram formed by the vectors 3hati-2hatj+hatk ...

    Text Solution

    |

  2. If veca=2hati-5hatj+4hatk and vecb=hati-4hatj+6hatk, then a unit v...

    Text Solution

    |

  3. If veca+vecb+vec c=vec0 and |veca|=3,|vecb|=5 and |vec c|=7, then the ...

    Text Solution

    |

  4. If vec alpha, vec beta, vecgamma be three unit vectors such that |ve...

    Text Solution

    |

  5. If veca=2hati+5hatj+7hatk and vecb=hati-hatj+5hatk, then the vecor co...

    Text Solution

    |

  6. The image of the point (-3, 5, 2) in the plane 2x-y+z+3=0 is -

    Text Solution

    |

  7. The equation of the plane passing through the points (1, -1, 2) and (2...

    Text Solution

    |

  8. The values of x, at which the first derivative of the function (x+(1)...

    Text Solution

    |

  9. If f(x)=sin3x cos4x, then the value of f''((pi)/(2)) is -

    Text Solution

    |

  10. Let f(x) be a differentiable even function, consider the following sta...

    Text Solution

    |

  11. If y=x+x^(2)+x^(3)+…oo where |x| lt 1, then for |y| lt 1 the value of...

    Text Solution

    |

  12. Find which function does not obey mean value theorem in [0, 1] -

    Text Solution

    |

  13. The derivative of sec^(-1)((1)/(2x^(2)-1))" w.r.t. "sqrt(1-x^(2)) " at...

    Text Solution

    |

  14. The derivative of the function f(x)=log(5)(log(7)x)[x gt 7] is -

    Text Solution

    |

  15. If 2y=(x-a)sqrt(2ax-x^(2))+a^(2)"sin"^(-1)(x-a)/(a), then the value of...

    Text Solution

    |

  16. The value of lim(x to 0)(1+3x)^((x+2)/(x)) is -

    Text Solution

    |

  17. If y=x^(3) then the value of ((d^(2)y)/(dx^(2)))/([1+((dy)/(dx))^(2)]^...

    Text Solution

    |

  18. If x=(1)/(z), y=f(x) and (d^(2)y)/(dx^(2))=kz^(3)(dy)/(dz)+z^(4)(d^(2...

    Text Solution

    |

  19. If xy=ax^(2)+(b)/(x), then the value of x^(2)(d^(2)y)/(dx^(2))+2x(dy...

    Text Solution

    |

  20. The value of c in Rolle's theorem when f(x)=2x^(3)-5x^(2)-4x+3, x in [...

    Text Solution

    |