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Homework Help: Cross Product orientation

  1. Apr 9, 2013 #1
    I am trying to compute
    -dx i CROSS -x i -y j
    i,j,k are the unit vectors

    x is from -∞ to ∞ and y can only be negative.

    Right hand rule tells me that the cross should be in the negative k direction but computing the cross product gives me y dx k.

    What's wrong?
  2. jcsd
  3. Apr 9, 2013 #2


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    Science Advisor
    Homework Helper

    I don't think anything is wrong. i x j=k. You might be imagining k pointing in the wrong direction when you are doing the right hand rule.
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