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How to do this question?

  1. Nov 4, 2006 #1
    If you were given vector A times vector B equals -10 and vector A times vector B = ABcos(x), how do you find x? also what plane is vector A and vector B on?
     
  2. jcsd
  3. Nov 4, 2006 #2
    x = arc cos(-10/AB)
    Translate vectors so that they touch each other, or intersect and they determin the plane they are in
     
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