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Finding Rotational matrix from axis-angle representation

  1. Dec 3, 2014 #1
    1. The problem statement, all variables and given/known data
    Given an axis vector u=(-1, -1, -1) , find the rotational matrix R corresponding to an angle of pi/6 using the right hand rule. Then find R(x), where x = (1,0,-1)

    2. Relevant equations
    I found the relevant equation on wikipedia (see attachment)
    3. The attempt at a solution
    I feel that I'm doing something wrong but I don't know what; I think I performed the calculations correctly.
    upload_2014-12-3_5-9-50.png upload_2014-12-3_5-10-6.png upload_2014-12-3_5-9-57.png
    Please help?http://blob:https%3A//www.physicsforums.com/99c786ac-ed37-4fb2-8cd5-0d1ea0a3afb5
     

    Attached Files:

  2. jcsd
  3. Dec 5, 2014 #2

    Simon Bridge

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    What makes you think something went wrong?
    Have you tried testing it, i.e. by applying R to u, or to a vector perpendicular to u, and see if you get the right result?
     
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