Mario Rodriguez Riotorto
Your syntax is not correct for draw2d. Try the following:
draw2d(explicit(sin(x), x, 0, 2*%pi)) $
Have you tried other interfaces, like xmaxima, wxmaxima, or command line?. I see you are working with emacs, and we should discard problems with the interfaces.
You can download the latest version of draw from the repository: