User Guide

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F and G evaluated at return the expected values.
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For more information on the D operator, refer to the ?D help page. For a
comparison of the diff command and D operator, refer to the ?diffVersusD
help page.
Directional Derivative
To compute and plot a directional derivative, use the Directional Derivative
Tutor. The tutor computes a floating-point value for the directional derivat-
ive.
To launch the tutor:
From the Tools menu, select Tutors, Calculus - Multi-Variable, and then
Directional Derivatives. Maple launches the Directional Derivative Tutor.
See Figure 4.7.
4.4 Calculus • 159