1. The problem statement, all variables and given/known data Hello, I am seeking help solving the following problem: find the transformation matrix that rotates a rectangular coordinate system through an angle of 120° about an axis making equal angles with the original three coordinate axes. 2. Relevant equations none, we need to find a Matrix 3. The attempt at a solution I've thought about it but my problem is trying to figure out how a 120° rotation would be, wouldn't the answer be different if I choose a different axis (one rotation around x1, another matrix if I choose x2, a different one if I choose x3) each time? Thanks.