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 Author Comment/Response Evan 01/17/03 3:37pm Hi, I am trying to perform a very simple matrix multiplication: a01 = {{1, 0, 0, 0}, {0, Cos[20], -Sin[ 20], 1.5}, {0, Sin[20], Cos[20], 0}, {0, 0, 0, 1}} a12 = {{Cos[-60], -Sin[-60], 0, 0}, {Sin[-60], Cos[-60], 0, 1}, {0, 0, 1, 0}, {0, 0, 0, 1}} // MatrixForm a01 . a12 However, Mathematica will not simplify the two matrixes by combining them into one matrix. I tried all the built in simplication functions but to no avail. My goal is not to have Mathematica evaluate the trig functions but simply combine the two matrices. Thanks, Evan URL: ,

 Subject (listing for 'Expanding matrix multiplication') Author Date Posted Expanding matrix multiplication Evan 01/17/03 3:37pm Re: Expanding matrix multiplication Forum Modera... 01/21/03 06:06am
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