Free math and engineering lessons in English

Cartesian to Polar Coordinates

Distance Between Two Polar Points

Polar Coordinates

The Identity Matrix

Cramer's Rule for Three Equations

Cramer's Rule for Two Equations

Finding the Determinant of a 3x3 Matrix

Calculating the Cross Product with a Determinant

What the Cross Product Means

The Right-Hand Rule

Calculating the Dot Product and the Angle

Dot Product and Cross Product

Vectors in the Coordinate Plane

The Resultant of Two Vectors

Vectors and Describing Direction

Chapter Review: Worked Practice Problems

Solving a System Three Different Ways

The Discriminant and the Type of Solutions

Three Ways to Solve a Quadratic Equation

Multiplying and Dividing Complex Numbers