Home
Class 11
MATHS
Let bara,barb,barc " be unit vectors an...

Let `bara,barb,barc " be unit vectors and " barx=bara+barb+barc . " If " bara.barx = 1, barb.barx=3/2 and absbarx = 2 , " then the angle between " barc and barx` is

A

`cos^(-1)(1/4)`

B

`cos^(-1)(3/4)`

C

`cos^(-1)(3/8)`

D

`cos^(-1)(5/8)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • DOT PRODUCT OF TWO VECTORS

    AAKASH SERIES|Exercise EXERCISE - II|71 Videos

  • DIRECTION COSINES AND RATIOS

    AAKASH SERIES|Exercise ADVANCED SUBJECTIVE TYPE QUESTIONS|8 Videos

  • ERRORS AND APPROXIMATIONS

    AAKASH SERIES|Exercise ADVANCED SUBJECTIVE TYPE QUESTION|15 Videos

Similar Questions

Explore conceptually related problems

If bara,barb,barc " are three non zero vectors, and " bara.barb = bara.barc rArr

If bara,barb,barc are unit coplanar vectors, then find [ 2bara-barb 2barb-barc 2barc -bara] .

[bara barb barc]+[bara barc barb] =

If three unit vectors bara,barb,barc " satisfy " bara+barb+barc =bar0 then the angle between bara and barb is

If bara xx barb=barc and barbxx barc=bara , then

If bara, barb, barc are unit vectors satisfying bara-sqrt(3)barb+barc=bar0 , then the angle between the vectors bara and barc is :

If bara,barb,barc " are unit vectors, then find least value of " 2(bara.barb)+2(barb.barc)+2(barc.bara) .

The nonzero vectors bara,barb and barc " are related by " bara=8barb and barc=-7barb . Then the angle between bara and barc si

If bara,barb,barc " are three vectors such the " bara=barb+barc,(barb,barc)=pi/2 and absbara=a, absbarb=b, absbarc=c then

AAKASH SERIES-DOT PRODUCT OF TWO VECTORS-PRACTICE EXERCISE
  1. The angle between the vectors bara and barb " is " 60^(@). " The the a...

    Text Solution

    |

  2. The vectors barx and bary " satisfy " 2barx +bary =barp and barx+2bary...

    Text Solution

    |

  3. Let bara,barb,barc " be unit vectors and " barx=bara+barb+barc . " I...

    Text Solution

    |

  4. If abs(bara+barb)lt abs (bara-barb) " then the angle between " bara an...

    Text Solution

    |

  5. If a,b,c are p^(th),q^(th),r^(th) " terms of an H.P and " baru=(q-r...

    Text Solution

    |

  6. If bara,barb,barc " are three mutually perpendicular vectors such that...

    Text Solution

    |

  7. If the angle between the vectros (x,3,-7) and (x,-x,4) is acute, then ...

    Text Solution

    |

  8. The value of c so that all real 'x' the vectors cxbari - 6barj+3bark, ...

    Text Solution

    |

  9. The values of x for which the angle between the vectors bara = xbari -...

    Text Solution

    |

  10. The unit vector in ZOX-plane making angles 45^(@) and 60^(@) " respect...

    Text Solution

    |

  11. If, in a right angled triangle ABC, the hypo tenus AB =p, then bar(AB...

    Text Solution

    |

  12. Let bara= 4bari-3barj+5bark . A vector b is coplanar with bari, barj ...

    Text Solution

    |

  13. The component of 5bari-3barj+bark " on " 2bari+barj+2bark is

    Text Solution

    |

  14. If the projection of the vector bari+barj+bark " on the vector " abari...

    Text Solution

    |

  15. Let bara= 2bari+3barj+k,barb = 4bari+barj and bari = bari - 3barj-bark...

    Text Solution

    |

  16. Let bara =2bari+3barj-bark, barb=bari-2barj+3bark. bare is a vector p...

    Text Solution

    |

  17. If bare(1),bare(2) and bare(3) are non-coplanar unit vectors and alp...

    Text Solution

    |

  18. In DeltaABC, " if " BC = a, CA = b and AB = C, " then what is the valu...

    Text Solution

    |

  19. If a,b,c,d are the vertices of a rhombus, then

    Text Solution

    |

  20. The angle between the diagonals of a parallelogram with the vectors 2b...

    Text Solution

    |