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Homework Help: Finding vector perpendicular to other vectors

  1. May 16, 2012 #1
    Find vector having unit length perpendicular to both x and y. x=(1,2,3) and y=(-1,0,1)?

    im not sure where to begin
     
  2. jcsd
  3. May 16, 2012 #2

    gneill

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    Staff: Mentor

    Start with the properties of the vector operations that you know.
     
  4. May 16, 2012 #3
    like the dot product? sorry i havent done vectors in 2 years so im rusty
     
  5. May 16, 2012 #4

    gneill

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    Sounds like a review is in order :smile: Why don't you list the common vector operations and do a bit of research on their properties. Hint: concentrate on the two forms of vector multiplication.
     
  6. May 16, 2012 #5
    okay so i think its the cross product and when i do it i get (2,-4,2), is that all? or is there something more
     
  7. May 16, 2012 #6

    gneill

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    Staff: Mentor

    The cross product is the right choice, and your result is good.
     
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