Hi, my question is simple. Is it possible to graph functions with two or more variables, ie. a circle with ((x-m)^2)+((y-n)^2)=r^2 , elypse etc? THe advantage of this would be gaphing a tangent for example. I know there is the option to use the polar description, but with polar, it isnt possible to graph normal functions and ie the above mentioned tangent. Thanx a lot for an answer!