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Vector problem

  1. May 9, 2007 #1
    1. The problem statement, all variables and given/known data

    Let A be an arbitrary vector and e be a unit vector in some fixed direction.Show that
    A=e(A.e)+e x (A x e)

    What is the geometrical significance of each of the two terms?

    2. Relevant equations
    3. The attempt at a solution

    I can show it easily.As the first term (a dot product) is the component in the e direction and the 2nd term(a cross product) is the component in the perpendicular direction.
    What else geometrical significance they may be talking about?
  2. jcsd
  3. May 9, 2007 #2


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    I think that's all they were looking for.
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