Home
Class 12
MATHS
The non-zero vectors veca,vecb and vecc ...

The non-zero vectors `veca,vecb` and `vecc` are related by `veca=8vecb` and `vecc=-7vecb`. Then the angle between `veca` and `vecc` is :

A

`pi`

B

0

C

`pi/4`

D

`pi/2`.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • VECTORS

    MODERN PUBLICATION|Exercise Exercise|500 Videos

  • UNIT TEST-4

    MODERN PUBLICATION|Exercise EXERCISE|13 Videos

Similar Questions

Explore conceptually related problems

If veca+vecb+vecc=vec0, |veca|=3,|vecb|=5 and |vecc|=7 , find the angle between veca and vecb .

If veca+vecb+vecc=vec0 and |veca|=3,|vecb|=5 , and |vecc|=7 , find the angle between veca and vecb .

Three vectors veca,vecb,vecc are such that vecaxxvecb= 3(vecaxxvecc) Also |veca|=|vecb|=1, |vecc|=1/3 If the angle between vecb and vecc is 60^@ then

Let veca and vecb be two unit vectors. If the vectors : vecc=veca+2vecb and vecd=5veca-4vecb are perpendicular to each other, then the angle between veca and vecb is :

let veca , vecb and vecc be three vectors having magnitudes 1, 1 and 2, respectively, if vecaxx(vecaxxvecc)+vecb=vec0, then the acute angle between veca and vecc is _______

the angle between vectors veca × vecb and vecb × veca is

For non-zero vectors veca, vecb and vecc , |(veca xx vecb) .vecc| = |veca||vecb||vecc| holds if and only if

If veca+vecb+vecc=vec0 and |veca|=3,|vecb|=5,|vecc|=7 , show that the angle between veca and vecb is 60^(@)

For two non-zero vectors veca and vecb , write when |veca+vecb|=|veca|+|vecb| holds.

MODERN PUBLICATION-VECTORS-Exercise
  1. If the projection of vecb on veca is twice the projection of veca on v...

    Text Solution

    |

  2. If (vecaxxvecb)^2+(veca*vecb)^2=144 and |veca|=4, then |vecb|=

    Text Solution

    |

  3. The non-zero vectors veca,vecb and vecc are related by veca=8vecb and ...

    Text Solution

    |

  4. The edges of a parallelopiped are of unit length and are parallel to ...

    Text Solution

    |

  5. If a, b, c and d are the unit vectors such that (atimesb)*(ctimesd)=1 ...

    Text Solution

    |

  6. If vecu, vecv, vecw are non -coplanar vectors and p,q, are real numbe...

    Text Solution

    |

  7. Let veca =hatj-hatk and vecc =hati-hatj-hatk. Then the vector b satisf...

    Text Solution

    |

  8. If the vectors veca=hati-hatj+2hatk.vecb=2hati+4hatj+hatk and vec c=la...

    Text Solution

    |

  9. The vectors veca and vecb are not perpendicular and vecc and vecd are ...

    Text Solution

    |

  10. Let veca=hati+hatj+hatk, vecb=hati-hatj+hatk and vecc=hati-hatj-hatk b...

    Text Solution

    |

  11. If the vectors phati+hatj+hatk,hati+qhatj+hatk and hati+hatj+rhatk(p n...

    Text Solution

    |

  12. Let a,b and c be three non-zero vectors which are pairwise non-colline...

    Text Solution

    |

  13. Let veca and vecb be two unit vectors. If the vectors : vecc=veca+2vec...

    Text Solution

    |

  14. Let ABCD be a parallelogram such that AB=q, AD=p and angleBAD be an ac...

    Text Solution

    |

  15. If veca and vecb are vectors such that |veca+vecb|=sqrt(29) and vecaxx...

    Text Solution

    |

  16. If the vectors vec(AB)=3hati+4hatk and vec(AC)=5hati-2hatj-4hatk are t...

    Text Solution

    |

  17. Let vec(PR)=3hati+hatj-2hatk and vec(SQ)=hati-3hatj-4hatk determine di...

    Text Solution

    |

  18. If [vecaxxvecb vecbxxvecc veccxxveca]=lambda[veca vecb vecc]^2, ...

    Text Solution

    |

  19. Let veca,vecb and vecc be three non-zero vectors such that no two of t...

    Text Solution

    |

  20. Let veca,vecb and vecc be three unit vectors such that : vecaxx(vecbxx...

    Text Solution

    |