1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Direction vector of a line

  1. Jun 8, 2006 #1
    How would I find the direction vector of a line given in the form ax + by + cz +d =0?

    Thankyou.
     
  2. jcsd
  3. Jun 8, 2006 #2

    TD

    User Avatar
    Homework Helper

    I see an equation of a plane, not a line.
     
  4. Jun 8, 2006 #3
    Damn, sorry, got carried away with my letters. I meant ax + by +c = 0. Sorry about that...
     
  5. Jun 8, 2006 #4

    TD

    User Avatar
    Homework Helper

    For a line, (1,m) is always a directional vector where m is the slope. Can you find the slope?
     
  6. Jun 8, 2006 #5
    Yeah - I thought it would be something simple like that. Thanks for your help.
     
  7. Jun 8, 2006 #6

    TD

    User Avatar
    Homework Helper

    You're welcome :smile:
     
  8. Jul 20, 2008 #7
    Thanks for asking that Q, it helped me too
     
  9. Jul 21, 2008 #8

    Defennder

    User Avatar
    Homework Helper

    I don't think there's a need to thank someone who started a thread two years ago and have not posted since.
     
  10. Jul 23, 2008 #9
    LORL.... Thanks for pointing that out. ( At least you still logon)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Direction vector of a line
  1. Direction Vector (Replies: 5)

  2. Vector lines (Replies: 3)

  3. Direction vector (Replies: 3)

Loading...