Some Useful tools from Vanderbilt Univ

Plot a function. This tool graphs a function of single variable.
Plot f(x) & f'(x). This tool graphs a function and its derivative.
Plot f(x), f'(x), and f"(x). This tools plots a function and its first two derivatives.
Plotting the tangent line. This tool computes the equation of the tangent line to the graph of a given function f(x) at the specified point x=a.
Plot several functions. This tools plots one or more functions on common or noncommon intervals.
Plot piecewise functions. This tools plots a function whose definition changes on different intervals.
Plot the graph of z=f(x,y) This tool plots the graph of a function of two variables: z=f(x,y).
Compute Riemann Sums. A tool for exploring and computing Riemann Sums.

Differentiate a function. This tool computes one or more derivatives of a function f(x).
Derivative tutor. This tools helps you hone your differentiation skills by demonstrating the techniques of differentiation.