Home
Class 12
MATHS
l=m=n=1 represent direction cosines of...

l=m=n=1 represent direction cosines of

A

the line one unit from x-axis

B

the line one unit from y-axis

C

the line one unit from z-axis

D

no line

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • STATISTICS MEASURE OF DIPERSION

    HIMALAYA PUBLICATION|Exercise QUESTION BANK|28 Videos

  • VECTORS AND THEIR APPLICATIONS

    HIMALAYA PUBLICATION|Exercise QUESTION BANK|296 Videos

Similar Questions

Explore conceptually related problems

Write the direction cosines of x-axis.

Write the direction cosines of z-axis.

If veca = ( 2 hati + 3 hatj + hatk ) then write the direction cosines of veca

If (1/3,1/4,k) are the direction cosines of a line then the value of k is

The coordinates of the point P=(3,4,5), then the direction cosines of vec OP are

If hata=(1)/(sqrt14) (2hati+hatj+hatk) then write the direction cosines of hata .

If alpha, beta, gamma are the angles that a line makes with the positive direction of x, y, z axis respectively, then the direction cosines of the line are

If the position vectors of the points A and B respectively are i+2j-3k and j-k find the direction cosines of AB

The projection of segment [PQ] on the co-ordinate planes are-9, 12, -8 respectively. The direction-cosines of PQ are :

The angle between the lines whose direction cosines satisfy the equation l+m+n=0 and l^(2)=m^(2)+n^(2) is

HIMALAYA PUBLICATION-THREE DIMENSIONAL GEOMETRY-QUESTION BANK
  1. The points (6,-1,2),(5,2,4) and (8,-7,k) are collinear, then k =

    Text Solution

    |

  2. The acute angle between the lines whose direction cosines are proporti...

    Text Solution

    |

  3. l=m=n=1 represent direction cosines of

    Text Solution

    |

  4. If a line lies in the octant O X Y Z and it makes equal angles with th...

    Text Solution

    |

  5. The direction cosines of the line joining (4,3,-5) and (-2,1,-8) are

    Text Solution

    |

  6. The coordinates of the point P=(3,4,5), then the direction cosines of ...

    Text Solution

    |

  7. A vector vec ris inclined at equal angles to O X, OY and OZ. If the ma...

    Text Solution

    |

  8. The direction cosines of a normal to the yz-plane are

    Text Solution

    |

  9. If (1/3,1/4,k) are the direction cosines of a line then the value of k...

    Text Solution

    |

  10. The direction ratios of vec PQ are 1,2,2 and P(2,-1,4). If |vec PQ| = ...

    Text Solution

    |

  11. If the direction cosines of two lines are proportional to 2,3,-6 and 3...

    Text Solution

    |

  12. A line making anlges 45^(@) and 60^(@) with the positive direction o...

    Text Solution

    |

  13. The distance of the point (4,3,5) from the y-axis is

    Text Solution

    |

  14. The distance of the point A(2,3,4) from z-axis is

    Text Solution

    |

  15. Coordinates of the foot of the perpendicular from the point (3,4,7) on...

    Text Solution

    |

  16. If the points (7,-2) , (5,1) and (3,5) are collinear. Find the value o...

    Text Solution

    |

  17. The points A (4,5,1), B (0,-1,-1), C(3,9,4) and D(-4,4,4) are

    Text Solution

    |

  18. The direction cosines l, m, n of two lines are connected by the relati...

    Text Solution

    |

  19. The ratio in which the line joining points (2, 4, 5), (3,5,- 4) is div...

    Text Solution

    |

  20. The projection of a line segment on x, y, z axes are respectively sqrt...

    Text Solution

    |