<Text-field style="Heading 1" layout="Heading 1"><Taskdata-inline tag_id="57"><Font style="Heading 1">Directional Derivative of a Multivariate Function</Font></Taskdata-inline></Text-field>

Determine the directional derivative of a multivariate function at a specified point in a specified direction.

Enter the function as an expression.

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Specify a point.

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Specify a direction vector.

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Compute the directional derivative.

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Alternatively, you can use the Directional Derivatives tutor, a point-and-click interface. There are two ways to launch this tutor.

From the Tools menu, select Tutors, Calculus - Multi-Variable, and then Directional Derivatives.

Enter the multivariate function to be differentiated, then click the following Directional Derivatives button.

_EnvDisableGlobalBindings := true: DirectionalDerivatives_temp := Student:-MultivariateCalculus:-DirectionalDerivativeTutor(DocumentTools:-Do(%MathContainer0)); if DirectionalDerivatives_temp <> NULL then DocumentTools:-SetProperty('Plot0','visible','true'); DocumentTools:-SetProperty('Plot0','value',DirectionalDerivatives_temp); fi;

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