Khan Academy

Tangent planes (K-A)

What is a tangent plane (K-A)

Double integrals (K-A)

Double integrals beyond volume (K-A)

Double integrals in polar coordinates (K-A)

Double integrals over non-rectangular regions (K-A)

Polar coordinates (K-A)

Double integrals 6 (K-A)

Double integral 1 (K-A)

Double integrals 2 (K-A)

Double integrals 3 (K-A)

Double integrals 4 (K-A)

Double integrals 5 (K-A)

Flux in 3D example (K-A)

Flux in three dimensions (K-A)

Unit normal vector of a surface (K-A)

Conceptual understanding of flux (K-A)

Constructing a unit normal vector (K-A)

Vector representation of a surface integral (K-A)

Arc length of function graphs, examples (K-A)

Arc length of function graphs, introduction (K-A)

Arc length of parametric curves (K-A)

Line integrals in a scalar field (K-A)

Notation for integrating along a curve (K-A)

Introduction to the line integral (K-A)