I am trying to figure this program out, but I'm running into some problems. I'm not doing anything terribly advanced, just trying to plot trig functions, and it keeps freezing up on me. Is there something I'm doing wrong? Can anyone tell me the "proper" way to type in a formula and then plot it? 2d, 3d, it doesn't matter, although 2d would be better for now. If anyone knows of any resources that would help me out, I'd appreciate that as well. Thanks!