Equation Grapher for Windows is a tool for plotting and analyzing functions.

Equation Grapher lets you draw graphs like y=2x and y=sin(x+10)-cos(3x). You can plot up to 12 graphs in different colors at the same time. Once you have plotted a function, Equation Grapher automatically finds roots, maximum/minimum, intersections, etc., and can also calculate and view integration area. Angles can be in either degrees or radians. It also features several zoom functions, a background grid, the ability to change the text of the x- and y-axis, file saving, the ability to print graphs directly or copy them to the Clipboard (to paste them into your word processor), and more.