How To Find The Directional Derivative and The Gradient Vector

This Calculus 3 video tutorial explains how to find the directional derivative and the gradient vector.  The directional derivative is the product of the gradient vector and the unit vector.  To find the gradient vector, you need to find the partial derivatives of f with respect to x, y, and maybe z for a 3 variable function.

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Distance Between Point and Plane:    
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Chain Rule - Partial Derivatives:            
Chain Rule With Partial Derivatives -...

Implicit Partial Differentiation:              
Implicit Differentiation With Partial...

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Directional Derivatives:                          
How To Find The Directional Derivativ...

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Double Integrals:                                      
Double Integrals

Local Extrema & Critical Points:            
Local Extrema, Critical Points, & Sad...

Absolute Extrema - Max & Min:            
Absolute Maximum and Minimum Values o...

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Lagrange Multipliers:                              
Lagrange Multipliers

Triple Integrals:                                        
Triple Integrals - Calculus 3

2nd Order - Differential Equations:      
Second Order Linear Differential Equa...

Undetermined Coefficients:                  
Method of Undetermined Coefficients -...

Variation of Parameters:                        
Variation of Parameters - Nonhomogene...

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