Calculus 3: Vector Calculus in 2D (14 of 39) Dot Product (A Second Method)

From a channel Lumen includes in full: Michel van Biezen (a physics instructor) has thousands of short worked lessons in physics, maths, chemistry and astronomy, organised by topic and course.

A 4-minute video from Michel van Biezen's catalogue; the title names its topic.

Video by Michel van Biezen, played through YouTube's embedded player.