A brief explanation of the concept of the gradient and the directional derivative.

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Vector Calculus Playlist: https://www.youtube.com/playlist?list=PLAPugvuQ4rD05swTdhH-KB62d-fhkWQ7L

Vector Calculus – Line Integrals (Scalar Fields):

https://www.youtube.com/watch?v=dGMCT8S0Ra4

Vector Calculus – Divergence:

https://www.youtube.com/watch?v=lVe7gqf-zsc

Vector Calculus – Curl:

https://www.youtube.com/watch?v=zZp07eqMP44