Multivariable calculus - Describing rotation in 3d with a vector

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/multivariable-calculus/multivariable-derivatives/curl-grant-videos/v/describing-rotation-in-3d-with-a-vector Learn how a three-dimensional vector can be used to describe three-dimensional rotation. This is important for understanding three-dimensional curl.