## Find Roots of Real-Valued Functions

> Type a new function and study its zero crossings. The info panel will show the numerical values of the roots. Open the info panel by pressing Ctrl-i or from the menu bar Inspector->Geometry->Info.

> ### Controls:

> Function expression textfield | Type the expression of a function whose zero crossing you want to study. Use any combination of mathematical functions described in Expressions.html.
> Slider "xMin" | Lower bound of definition interval of the function.
> Slider "xMax" | Upper bound of definition interval of the function.
> Slider "Discr of Polygon" | Number of equidistant samples being computed in the definition interval. The function will be evaluated at sample points to find starting values for the searching algorithm.

> View source code:
> PaRootFinder.java of applet,
> PjRootFinder of project,
> PjRootFinder_IP of project panel.