In this video, Patrick gives the formula and does an example of finding the Directional Derivative that corresponds to a given angle.

1. Basic Derivative Formulas (Part 1)
2. Basic Derivative Formulas (Part 2)
3. Sketching the Derivative of a Function
4. Equation of a Tangent Line
5. Linearization at a Point
6. Finding the Derivative Using Its Definition
7. Product Rule (1/2)
8. Product Rule (2/2)
9. Quotient Rule (1/2)
10. Quotient Rule (2/2)
11. Derivatives Using the Chain Rule (Part 1)
12. Derivatives Using the Chain Rule (Part 2)
13. Chain Rule: Harder (Ex. 1)
14. Chain Rule: Harder (Ex. 2)
15. Chain Rule: Harder (Ex. 3)
16. More Complicated Derivative Examples (Part 1)
17. More Complicated Derivative Examples (Part 2)
18. Using the Product and Chain Rule to Find a Derivative: Then Factoring and Simplifying
19. Derivatives Using Implicit Differentiation (Part 1)
20. Derivatives Using Implicit Differentiation (Part 2)
21. Derivatives Using Implicit Differentiation (Part 3)
22. Related Rates Problems and Implicit Differentiation
23. Related Rates Involving a Cone
24. Related Rates: A Point Moving on a Graph
25. Related Rates: With Trigonometry
26. Related Rates: Baseball Diamond Example
27. Logarithmic Differentiation (Part 1)
28. Logarithmic Differentiation (Part 2)
29. Derivatives Involving Logarithmic Functions: ln(x), log (x), etc.
30. Properties of Logarithms: Functions
31. Derivatives Involving Exponential Functions: e^x, a^x, etc
32. Derivatives Involving Inverse Trigonometric Functions
33. Inverse Trigonometric Derivative: Example 1
34. Inverse Trigonometric Derivative: Example 2
35. Inverse Trigonometric Derivative: Example 3
36. Inverse Trigonometric Derivative: Example 4
37. Finding Partial Derivatives
38. The General Chain Rule (Part 1)
39. The General Chain Rule (Part 2)
40. Newton's Method
41. Where a Function is Increasing and Decreasing, Finding Local Max and Local Min
42. Increasing/Decreasing, Local Maximums/Minimums
43. Finding Critical Numbers (Part 1)
44. Finding Critical Numbers (Part 2)
45. First Derivative Test (Part 2)
46. First Derivative Test (Part 2)
47. Lagrange Multipliers: Finding Max or Min
48. Using the Second Derivative to Find Local Max and Min
49. Using the Second Derivative to Find Where a Function is Concave Up/Concave Down
50. Optimization Problem (Part 1)
51. Optimization Problem (Part 2)
52. Optimization Problem (Part 3)
53. Finding Local Max, Min and Saddle Points (Part 1)
54. Finding Local Max, Min and Saddle Points (Part 2)
55. Curve Sketching Using Calculus: (Part 1 of 2)
56. Curve Sketching Using Calculus (Part 2 of 2)
57. Directional Derivatives
58. Differentials and Approximations

In this course, Calculus Instructor Patrick gives 58 video lessons on Differentiation. Some of the topics covered are:  Derivative Formulas, Derivative of a Function, Equation of a Tangent Line, Linearization at a Point, Product Rule, Quotient Rule, Chain Rule, Logarithmic Differentiation, Newton's Method, Lagrange Multipliers, and many more.

Tags: Math, Math Calculus