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Homework Help: Angle between planes

  1. Apr 8, 2008 #1
    1. The problem statement, all variables and given/known data

    Find the acute angle between the planes Ax+By+Cz=D and Ex+Fy+Gz=H

    2. Relevant equations

    3. The attempt at a solution

    I have no idea
  2. jcsd
  3. Apr 8, 2008 #2


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    Science Advisor
    Homework Helper

    The angle between the planes is the same as the angle between the normals to the planes.
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