On 20 May 2010 14:55, Nadav Har'El <nyh at math.technion.ac.il> wrote: I like this online calculator: http://www.google.com/search?q=sin(pi/2) Sometimes I use the KDE Krunner (Alt-F2) calculator. Sometimes I use the Python command line. -- Dotan Cohen http://gibberish.co.il http://what-is-what.com