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!

Coplanar math problem

  1. Apr 12, 2008 #1
    1. The problem statement, all variables and given/known data
    Find all values of t so that the three vectors a=(1,2,3) b=(4,5,6) and c=(7,8,t) are coplanar.


    2. Relevant equations
    (axb) [tex]\bullet[/tex] c=0


    3. The attempt at a solution

    (1, 2, 3) x (4, 5, 6)
    (-3,6,-3)
    (-3,6,-3)[tex]\bullet[/tex](7,8,t)
    27=3t
    t=9

    it says find ALL values of t. i keep getting 9 through different combinations. is there only one value of t? thnks
     
    Last edited: Apr 12, 2008
  2. jcsd
  3. Apr 12, 2008 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    Yes, there is only one value of t. If you'd gotten 27=0*t for your last equation then any t would work. But you didn't.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Coplanar math problem
  1. Coplanar vectors (Replies: 4)

  2. A Math Problem (Replies: 14)

  3. Financial math problem (Replies: 3)

Loading...