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Can anyone PLEASE explain axis rotation?

  1. Jan 16, 2008 #1
    So I am asked to rotate by 45 degrees about the y-axis.

    With the power of the net i found that it is;
    [ cos(45) 0 sin (45);
    0 1 0;
    -sin(45) 0 cos(45)]

    i really would like to understand HOW they get this.

    THANKS in advance!!!!!!!
  2. jcsd
  3. Jan 16, 2008 #2

    Doc Al

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    Staff: Mentor

  4. Jan 16, 2008 #3
    Thank you, that helped alot!! I get finally get it now!!
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