# Lessons - Precalculus

**Binomials**

**Binomials**

Distribute Binomials - Foil Method

Distribute Binomials - Foil Method - Coefficients Not 1 Video

Distribute Binomials - Foil Method - Coefficient is NOT One and Multiple Variables worksheet

Next one

**Complex Numbers**

**Complex Numbers**

Convert Complex Numbers in Standard to Trigonometric Form

Convert Complex Numbers in Trigonometric to Standard Form Video

Multiply & Divide Complex Numbers in Trigonometric Form

**Formulas**

**Formulas**

Heron's Formula worksheet

**Infinite Sequences**

**Infinite Sequences**

Binomial Theorem with Pascal's Triangle

Binomial Theorem with Combinations and not Pascal's Triangle

Combination Video

Explicit & Recursive Sequences Worksheet

Geometric Sequences Video

Geometric Sequences - Repeating Decimals to Fractions

Mathematical Induction Worksheet

Permutation Video

**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

Gauss Jordan Elimination worksheet? video?

Partial Fraction Decomposition worksheet

Row Echelon Form/Reduced Row Echelon Form

Find Area Using Determinants

not yet - cross

**Trigonometry**

**Trigonometry**

Angles Convert from Degrees or Radians to the Other

Graph Tangent video

Odd Even Identities (Negative Angle Identities)

Unit Circle video and worksheet

Addition and Subtraction Formulas

Double and Half Angle Formulas video

Solve Equations video

Product-to-Sum and Sum-to-Product Formulas redo pictures/explanations maybe worksheet

Verifying Identities with Trigonometric Functions

**Vectors**

**Vectors**

Vectors - Basics video and worksheet

Vectors - Components video and worksheet

Vectors - Find the Direction