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Homework Help: Does anyone know what this notation means?

  1. Jan 21, 2009 #1
    1. The problem statement, all variables and given/known data

    The question is asking for us to compute compab

    2. Relevant equations



    3. The attempt at a solution
    Is it another notation for projection?
     
  2. jcsd
  3. Jan 21, 2009 #2
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