# Lessons - Precalculus

**Binomials**

**Binomials**

Distribute Binomials Video

Distribute Binomials When Coefficient is NOT One

Next one

**Complex Numbers**

**Complex Numbers**

Convert Complex Numbers in Standard to Trigonometric Form

Convert Complex Numbers in Trigonometric to Standard Form Video

De Moivre's Theorem Video

Multiply & Divide Complex Numbers in Trigonometric Form Video

Nth Root Theorem Video

**Infinite Sequences**

**Infinite Sequences**

Binomial Theorem with Pascal's Triangle

Binomial Theorem with Combinations and not Pascal's Triangle

Combination Video

Explicit & Recursive Sequences V & W

Geometric Sequences Video

Geometric Sequences - Repeating Decimals to Fractions Video

Mathematical Induction Worksheet

Permutation Video

Sigma Notation Video

**Formulas**

**Formulas**

Heron's Formula worksheet

**Matrices**

**Matrices**

Properties

How to Read and Can We Add/Subtract and Multiply

Operations

Determinant

Inverse

Inverse of 2 x 2 and 3 x 3 with Formula

Inverse of a 2 x 2 with Gauss Jordan

Inverse of a 3 x 3 with Gauss Jordan

Solving System of Equations

Application with 3 x 3 Matrices

Row Echelon Form/Reduced Row Echelon Form

Gauss Jordan Elimination worksheet? video?

Find Area Using Determinants

not yet - cross

**Trigonometry**

**Trigonometry**

Angles Convert from Degrees or Radians to the Other video

Angles Coterminal in Trigonometry video and worksheet

Addition and Subtraction Formulas video and worksheet

Double and Half Angle Formulas video and worksheet

Solve Equations video and worksheet

Product-to-Sum and Sum-to-Product Formulas video and worksheet

Verifying Identities with Trigonometric Functions video

Graph Sine and Cosine video