Vector Proof Homework: The Rotation Matrix

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Homework Statement


upload_2017-1-26_14-20-50.png


Homework Equations


The Rotation Matrix

The Attempt at a Solution


I am sorry but I do not know how to even begin
 
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Hello Andrew, :welcome: (welcome back, that is.)

Not much joy with thread #1, I see. You should know that PF guidelines don't allow help unless an attempt at solution is posted. Least you could do is write down a rotation matrix as described in the problem statement and let it loose on the vector.