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Homework Help: Given a 3D vector, how to find the angle it forms with a plane?

  1. Oct 10, 2009 #1
    Say I'm given a random 3-dimensional vector, pointing from the origin. How can I find the angle it forms with a plane defined by two other vectors?
     
  2. jcsd
  3. Oct 10, 2009 #2

    D H

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    This looks like homework. If it is, you should have posted in the homework section -- and shown some work.
     
  4. Oct 11, 2009 #3

    D H

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    Use the angle between the line and a normal to the plane.
     
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