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Dot product of vectors

  1. Jan 26, 2012 #1
    say for example for 2 vectors A.B=0 and for another pair A.C=0.is it necessary that B is parallel to C.If yes how?
  2. jcsd
  3. Jan 27, 2012 #2


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    As long as A and B are not zero, A.B=0 means A and B are perpendicular. A.C means A and C are perpendicular. That does not mean that B and C are parallel. Think of the three cartesian axes vectors X, Y, and Z: X.Y=0 and X.Z=0 but Y and Z are not parallel.
  4. Jan 27, 2012 #3
    Only in 2D.
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