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Homework Help: The angle of intersection between a curve and a plane

  1. May 11, 2013 #1
    1. The problem statement, all variables and given/known data


    r(t) hits the xy plane at the point (12,23,0). Find the angle on intersection of r(t) with the xy plane at that point.


    2. Relevant equations


    3. The attempt at a solution

    I find the answer was 0.0017 degree, but the answer was absolutely wrong....

    please help me :)
  2. jcsd
  3. May 11, 2013 #2


    User Avatar
    Science Advisor

    You haven't actually shown what you did. What did you use for A and B?
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