Home
Class 11
MATHS
If the d.c.s of the line joining the oin...

If the d.c.s of the line joining the oints P(4,3,5) and Q(1,1,k) are `(3)/(7),(2)/(7),(6)/(7)` then k =

A

-1

B

11

C

1

D

-11

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • DIRECTION COSINES & RATIOS

    AAKASH SERIES|Exercise EXERCISE - II|18 Videos

  • DIFFRENTATION

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (PRACTICE SHEET (ADVANCED)) (Integer Type Questions)|5 Videos

  • DIRECTION COSINES AND RATIOS

    AAKASH SERIES|Exercise ADVANCED SUBJECTIVE TYPE QUESTIONS|8 Videos

Similar Questions

Explore conceptually related problems

The intercepts of line joining the points (4, -7), (1, -5) are

Find the dr's and dc'r of the line joining the points (4,-7,3),(6,-5,2).

Slope of the line joining the points A(-1 .4, - 3.7) and B(-2.4,1.3) is ....

The projection of the join of the points (3,4,2), (5,1,8) on the line whose d.c's are ((2)/(7),(-3)/(7),(6)/(7)) is

Find the slope of the line joining the two given points A(-1.4, -3.7), B(-2.4, 1.3)

Show that the line joining the points P(0,1,2) and Q(3,4,8) is parallel to the line joining the points R(-2,(3)/(2),-3)andS((5)/(2),6,6)

AAKASH SERIES-DIRECTION COSINES & RATIOS-PRACTICE EXERCISE
  1. Match the following {:("List-1","List-II"),("(A)D.C's of x-axis",(1)...

    Text Solution

    |

  2. The number of lines which are equally inclined to the coordinate axe...

    Text Solution

    |

  3. If the d.c.s of the line joining the oints P(4,3,5) and Q(1,1,k) are (...

    Text Solution

    |

  4. If d.c's of the line joining the origin and a point unit distance from...

    Text Solution

    |

  5. If (1,2,-2) are the D.R's of a line then Statement-I : The D.C's of t...

    Text Solution

    |

  6. Assertion (A) : If a line make angles 45^(@), 45^(@) with the x and y ...

    Text Solution

    |

  7. If a line makes angles cos^(-1)(1//5),cos^(-1)(3//5) with X and Y- axe...

    Text Solution

    |

  8. The angle between the two lines whose direction cosines are ((sqrt(3))...

    Text Solution

    |

  9. The angle between the line passing through the points (3,1,-2) and (4...

    Text Solution

    |

  10. If the d.r's of two lines are (x,3,5) and (2,-1,2) and if the anlgle ...

    Text Solution

    |

  11. The d.r.s of two perpendicular lines are 1,-3,5 and lambda,1 + lambda...

    Text Solution

    |

  12. If the line joining the points (-1,2,3) (2,-1,4) is perpendicular to t...

    Text Solution

    |

  13. If (1,-2,-2) and (0,2,1) are direction ratios of two lines, then direc...

    Text Solution

    |

  14. If the line joining the points (1,4,2) and (-2,1,2) is inclined at an...

    Text Solution

    |

  15. If the d.r's of bar(OA),bar(OB) are (1,-2,3),(-3,4,5) then the d.c's ...

    Text Solution

    |

  16. If (l(1),m(1),n(1)),(l(2),m(2),n(2)) are d.c's of two lines then find ...

    Text Solution

    |

  17. If the d.c's of the two lines are (2)/(3),(2)/(3),(1)/(3),(5)/(13),(12...

    Text Solution

    |

  18. If (6,-2,-3),(1,2,2) are d.r's of two lines then the d.c's of line bis...

    Text Solution

    |

  19. If (l(1),m(1),n(1)),(l(2),m(2),n(2)) are direction cosines of two line...

    Text Solution

    |

  20. If the d.c's (l,m,n) of two lines are related as l + m + n = 0, 2lm -...

    Text Solution

    |