Orthogonal Matrix - Linear Algebra

carrotcake10
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Homework Statement



[PLAIN]http://img504.imageshack.us/img504/4985/capturewm.jpg

Homework Equations



N/A

The Attempt at a Solution



This is more of a conceptual question so I need a little help knowing what kinds of things to look for.
 
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on Phys.org
Well what does it mean for a matrix to be orthogonal?
 

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