document.write( "Question 751174: what is a rotation matrix? \n" ); document.write( "
Algebra.Com's Answer #457028 by tommyt3rd(5050)\"\" \"About 
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It is a matrix that is used to perform a rotation in the xy-plane or in 3D space. We use 2x2 matrices for 2D and 3x3 for 3D\r
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