1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    I think that's all they were looking for.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook