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Find vector parallel to two planes

  1. Feb 2, 2017 #1
    1. The problem statement, all variables and given/known data
    Find unit vector(s) that are parallel to both of the planes 6x + y + z = 1 and x − y − z = 0 .

    2. Relevant equations
    N/A

    3. The attempt at a solution
    OK. So here is my reasoning - I find the normal of both the given planes and find the cross product between the vectors. The resultant vector will be parallel to both of the planes. I normalize the vector after to obtain the final answer. Is my logic correct? This is my first post on PF so I'm not sure if there is anything else I need to provide :smile:
     
  2. jcsd
  3. Feb 2, 2017 #2

    Orodruin

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    Yes.
     
  4. Feb 2, 2017 #3
    Thanks. Is LaTeX necessary for this forum? I will probably ask some questions in the physics sections soon and was wondering what formatting is preferred. Also how do i close this thread?
     
  5. Feb 2, 2017 #4

    Orodruin

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    I would highly recommend it for more advanced maths. For simple things there is no point really. There is a short introduction on how to use it on the forum here: LaTeX Primer

    You cannot close the thread. In the homework sections, you can mark a thread as solved by clicking "mark solved" in the upper right corner.
     
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