EdenGraph is a free Mac application that allows you to generate two-dimensional graphs using any desired trigonometric or algebraic function that you can think of. Compared to other mathematical tools, this piece of software doesn't just let you view the graphs, but you can also zoom in and out or move it however you want.
Using EdenGraph is very simple and all you have to do in order to generate the desired graph is simply provide the function and click on the "Graph" button. It can't get much easier than that. Once you have done that, you can easily magnify it.
A nice feature that EdenGraph puts at your disposal is the fact that you can save and edit equations. This way, you won't have to re-type the desired functions and equations every single time you want to view their graphs. You can simply save them and access them at any desired time with very little effort.
All in all, EdenGraph is a free Mac application that is definitely worth trying if you want to generate and view two-dimensional graphs for any algebraic and trigonometric functions in a simple manner.