Mathematica 9 is now available
Student Support Forum
-----
Student Support Forum: 'Expanding matrix multiplication' topicStudent Support Forum > General > Archives > "Expanding matrix multiplication"

Next Comment >Help | Reply To Topic
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
Next Comment >Help | Reply To Topic