Does anyone know of a free maths program I can download that lets you draw graphs in 3D?
Dear SyNtHeSiS,
I use the Eular Mathematical toolbox (Euler Math Toolbox - News). Hope it will be helpful to you.
you can graph everything with this one and its free. it has equation input, equation stack. record variables. you can do trig conics geometry etc.
http://www.geogebra.org/