[texhax] A PSTricks question

[Philip TAYLOR]

>>I'm sure I wrote the inverse trig. functions for plain TeX
>>some many years ago, but I can no longer remember the context
> 
> 
> What do you mean by this, for Plain TeX ?
> Do you mean numerical approximations, using TeX's integer arithmetic;
> e.g.  a Taylor approximation ?

Looks as if I didn't do the inverse functions after all; here is
what I did come up with (circa 1991) which may at least serve
as a starting point ...

	ftp://ftp.sunsite.auc.dk/disk2/ctan/macros/latex209/contrib/misc/trigonometry.tex

** Phil.