14: Directional Derivatives and Gradient - Valuable Vector Calculus

Explanation of directional derivatives as a dot product and how they relate to the gradient vector. We also talk about contour lines! Full Valuable Vector Calculus playlist: https://www.youtube.com/playlist?list=PLug5ZIRrShJHgsWPng59fFFoqn183aO-1 New math videos every Monday and Friday. Subscribe to make sure you see them!