Maxima mentioned on Slashdot

Maxima doesn't have an entirely satisfactory way to automatically scale all arguments to the trigonometric functions by
%pi/180. There are some partial workarounds mentioned on the Maxima list:

 http://www.math.utexas.edu/pipermail/maxima/2008/010584.html
 http://www.math.utexas.edu/pipermail/maxima/2009/015456.html
 http://www.math.utexas.edu/pipermail/maxima/2009/015458.html

I'm not a Slashdot reader, so maybe these messages (or others) have already been suggested. 

By the way: sin(30) = %pi/6 gives me the creeps--different things should generally have distinct names.

--Barton

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Fwiw, I posted a (anonymous) reply to the Slashdot post.