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!

Find cartesian equations of the line of intersection of the planes

  1. May 14, 2012 #1
    1. The problem statement, all variables and given/known data
    Find cartesian equations of the line of intersection of the planes x+3y-6z =2 and 2x+7y-3z=7

    3. The attempt at a solution
    What I did first was I cross product the 2 equation and then I got 33i-9j+k
    Then I took both of the equation and let y = 0. After that my answer seems to be weird.. Did I did anything wrong? The answer of the book was given ∴x+7/33 = y-3/-9 = z
     
  2. jcsd
  3. May 15, 2012 #2

    vela

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Education Advisor

    What do you mean by weird? In any case, your method, at least to me, seems to be a bit of overkill. Why not just solve the system of equations the usual way?
     
  4. May 15, 2012 #3
    Never mind. I managed to solve it. Thank you for the reply :)
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook