Tony Verhulst wrote:

Not all calculators have cotan (my computer's desktop calculator
doesn't, nor does my HP-28S), but 1/tan(x) gives the same answer.


Ah, true, but there's this thing called the World Wide Web :-)

I think I may have heard of that somewhere, but its nice to have these
things on the desktop.

I just checked the old standby command line calculators. No joy there
either. However, all is not lost - my spreadsheet has the lot. I'm using
Open Office, but Excel probably has them all too.


--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |