These videos were produced for the online trigonometry class. However, they are available for anyone to use. The sections will not match the textbook in use for the residential course; however, student can use a video by topic.

### Math1252

#### Unit 1

- Section 1-1-1 Angles
- Section 1-1-2 Radian Measure
- Section 1-1-3 Degree Measure
- Section 1-1-4 Applications
- Section 1-2-1 The Unit Circle
- Section 1-2-2 The Trigonometric Functions
- Section 1-2-3 Domain and Period of Sine and cosine

#### Unit 2

- Section 1-3-1 The Six Trigonometric Functions
- Section 1-3-2 Trigonometric Identities
- Section 1-3-3 Applications Involving Right Triangles
- Section 1-4-1 Trigonometric Functions of Any Angle
- Section 1-4-2 Reference Angles
- Section 1-4-3 Trigonometry Functions of Real Numbers

#### Unit 3

- Section 1-5-1 Basic Since and Cosine Curves
- Section 1-5-2 Amplitude and Period
- Section 1-5-3 Translations of Sine and Cosine Curves
- Section 1-5-4 Mathematical Modeling
- Section 1-6-1 Graph of the Tangent Function
- Section 1-6-2 Graph of the Cotangent Function
- Section 1-6-3 Graphs of the Reciprocal Functions
- Section 1-6-4 Damped Trigonometric Graphs

#### Unit 5

- Section 1-7-1 Inverse Sine Function
- Section 1-7-2 Other Inverse Trigonometric Functions
- Section 1-7-3 Compositions with Inverse Trigonometric Functions
- Section 1-8-1 Applications Involving Right Triangles
- Section 1-8-2 Trigonometry and Bearings
- Section 1-8-3 Harmonic Motion

#### Unit 6

- Section 2-1-1 Introduction
- Section 2-1-2 Using the Fundamental Identities

#### Unit 7

- Section 2-2-1 Verifying Trigonometric Identities
- Section 2-3-1 Using Standard Algebraic Techniques
- Section 2-3-2 Equations of Quadratic Type
- Section 2-3-3 Functions Involving Multiple Angles
- Section 2-3-4 Using Inverse Functions

#### Unit 8

- Section 2-4-1 Using Sum and Difference for Formulas
- Section 2-5-1 Multiple-Angle Formulas
- Section 2-5-2 Power-Reducing Formulas
- Section 2-5-3 Half-Angle Formulas
- Section 2-5-4 Product-to-Sum and Sum-to-Product Formulas

#### Unit 10

- Section 3-1-1 Introduction-Law of Sines
- Section 3-1-2 The Ambiguous Case (SSA)
- Section 3-1-3 Area of an Oblique Triangle
- Section 3-1-4 Applications-Law of Sines
- Section 3-2-1 Introduction-Law of Cosines
- Section 3-2-2 Applications-Law of Cosines
- Section 3-2-3 Heron's Area Formula

#### Unit 11

- Section 3-3-1 Introduction-Vectors in the Plane
- Section 3-3-2 Component Form of a Vector
- Section 3-3-3 Vector Operations
- Section 3-3-4 Unit Vectors
- Section 3-3-5 Direction Angles
- Section 3-4-1 The Dot Product of Two Vectors
- Section 3-4-2 The Angle Between Two Vectors
- Section 3-4-3 Finding Vector Components

#### Unit 12

- Section 4-1-1 Complex Numbers
- Section 4-1-2 Operations with Complex Numbers
- Section 4-1-3 Complex Conjugates
- Section 4-1-4 Complex Solutions of Quadratic Equations
- Section 4-3-1 The Complex Plane

#### Unit 14

- Section 4-4-1 Trigonometric Form of a Complex Number
- Section 4-4-2 Multiplication and Division of Complex Numbers
- Section 4-5-1 Powers of Complex Numbers
- Section 4-5-2 Roots of Complex Numbers