Update: It really does go without saying, the FX-CG50 is a beast of a calculator. But my trusty FX-991EX is still good for a lot of things. They are both good calculators. :
FX-CG50PRIZM Graphing | Casio USA
fx-CG50 | Graphing calculator | CASIO
A new Casio PRIZM calculator: The fx-CG50 - Page 2
Transformation of graphs on the fx-CG50 | y = cos (x) using BUILT IN graphs - YouTube