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Vectors - dot product and cross product?

  1. Apr 14, 2014 #1
    Vectors -- dot product and cross product?


    may i know when to dot product and cross product?? both look to same to me..
  2. jcsd
  3. Apr 14, 2014 #2


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    Staff: Mentor

    The formula will tell you which to use, so pay close attention.

    Basically, the dot product produces a scalar result---it has a magnitude and a + or - sign---but it isn't a vector. The cross product produces an answer which is itself a vector, and it's at right-angles to the plane containing the two vectors you multiplied.
  4. Apr 14, 2014 #3


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    Staff: Mentor

    Dot products, cross products, and other basic vector operations are described here:


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