On Thu, 10 Feb 2011, Barton Willis wrote:
> Apparently, Maxima sometimes tries a z =tan(x/2) substitution (expunged
> from calculus books in the 1980s?)
I don't know if you count
<http://www.phy.cam.ac.uk/teaching/teachingfiles/formulae.pdf> as a
"calculus book", but it's right there on page 14 of the 2005 edition.