Home
Class 11
MATHS
(bara.bari)^(2) + (bara.barj)^(2) + (bar...

`(bara.bari)^(2) + (bara.barj)^(2) + (bara.bark)^(2) =`

A

`bara^(2)`

B

`2bara^(2)`

C

`3bara^(2)`

D

`4bara^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • DOT PRODUCT OF TWO VECTORS

    AAKASH SERIES|Exercise EXERCISE - II|71 Videos

  • DOT PRODUCT OF TWO VECTORS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|57 Videos

  • DOT PRODUCT OF TWO VECTORS

    AAKASH SERIES|Exercise ADDITIONAL EXERCISE|21 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
AAKASH SERIES-DOT PRODUCT OF TWO VECTORS-EXERCISE - I
  1. If bar(OA) =bari + 2barj+3bark, bar(OB) = 3bari +barj - 2bark and bar...

    Text Solution

    |

  2. If barp = (2,1,3), barq = (-2,3,1), barr = (3,-2,4) and barj is the un...

    Text Solution

    |

  3. (bara.bari)^(2) + (bara.barj)^(2) + (bara.bark)^(2) =

    Text Solution

    |

  4. If bara " is perpendicular to " bari+barj+ bark " then the vector " b...

    Text Solution

    |

  5. If absbara =3, absbarb = 4 and (bara,barb) = pi/2," then " abs(bara+ba...

    Text Solution

    |

  6. If 'theta' is the angle between the unit vectors bara, barb," then " a...

    Text Solution

    |

  7. If the sum of two unit vectors is an unit vector, the magnitude of the...

    Text Solution

    |

  8. If absbara =3, absbarb = 4, and (bara-barb) = 5, " then " abs(bara+ba...

    Text Solution

    |

  9. If abs(bara+barb) = abs(bara-barb), " then " bara.barb =

    Text Solution

    |

  10. If bara,barb,barc are three vectors such that absbara =1, absbarb = ...

    Text Solution

    |

  11. If bara = 3bari - 4barj +5bark, barb = 2bari+3barj-bark ," then the an...

    Text Solution

    |

  12. If bara =-bari+barj+2bark, barb =2bari +barj-bark, barc =-2bari+barj+3...

    Text Solution

    |

  13. The acute angle made by the line joining the points (1, -3 ,2) and (3,...

    Text Solution

    |

  14. If bara = bari+2barj+3bark, barb = -bari+2barj+bark, barc =3bari +barj...

    Text Solution

    |

  15. If the vectors bari -2xbarj-3ybark and bari +3xbarj+2ybark are orthogo...

    Text Solution

    |

  16. If bara=bari+barj+tbark, barb=bari+2barj+3bark, then the value of 't' ...

    Text Solution

    |

  17. If the vectors bara =bari - barj + 2bark, barb =2bari+4barj+bark and b...

    Text Solution

    |

  18. If bara,barb, bara+barb " are unit vectors, then " (bara,barb)=

    Text Solution

    |

  19. If three unit vectors bara,barb,barc " satisfy " bara+barb+barc =bar0 ...

    Text Solution

    |

  20. The orthogonal projection vector of bara = 2bari + 3barj+3bark " on "...

    Text Solution

    |