1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Help with equations of lines

  1. Sep 25, 2009 #1
    1. The problem statement, all variables and given/known data
    Find parametric and symmetric equations for the line through P0 (3,3,0) and perpendicular to both given vectors (1,1,0) and (0,1,1)

    2. Relevant equations parametric: x=x0+at, y=y0+bt, z=z0+ct;
    symmetric: x-x0/a=y-y0/b=z-z0/c

    3. The attempt at a solution What is first did is to find the cross product of i and j, but i dont know where to go from here.
  2. jcsd
  3. Sep 25, 2009 #2


    User Avatar
    Homework Helper

    use the cross product of both your vectors to give you the direction of the line, say v

    if p is the point your line goes through, then your line will be given by p + v.t
  4. Sep 25, 2009 #3
    thanks a lot!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook