Trigonometric Functions

The Unit Circle and Radians

• Radian Measure

• The Unit Circle

• Sine and Cosine in the Unit Circle

• Multiples of 30 and 45 Degrees and the Unit Circle

• Unit Circle Diagram Explained

• Unit Circle: Reference Angles and Values

A full set of lessons covering the unit circle and radians, trig identities, periodic functions and their graphs, and trig equations.

Explore the unit circle and radians, reference angles, sine and cosine, and special relationships.

Identities & Equations

Trigonometric Functions

• Intro Periodic Functions

• Trigonometric Functions

• Periodic Function Parameters

• Graphing the Sine and Cosine Curves

• Transformations of Trigonometric Functions

• Transformations of Sine and Cosine Functions

• The Tangent Curve

• Periodic Function Word Problems

• Modeling Data with Periodic Functions

• Modeling with Trigonometric Functions

• Review I

• Review II

• Unit Circle and Trigonometric Identities

• Double Angle Trigonometric Identities

• Trigonometric Equations I

• Trigonometric Equations II

• Factoring and Solving Trig Equations

• Simplifying Trigonometric Expressions

Trigonometry as a mathematical function and it's parameters, transformations, and graphs; trig functions applied to real world situations.

Trigonometric Function Review

• Review I

• Review II

Reviews all content on this page.