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Angles, identities, and trig functions giving you trouble? Trigonometry is explained step-by-step so solving problems feels more approachable.

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Patrick Ford

Callie Rethman

Nick Kaneko

0. Review of College Algebra

1. Measuring Angles

2. Trigonometric Functions on Right Triangles

3. Unit Circle

4. Graphing Trigonometric Functions

5. Inverse Trigonometric Functions and Basic Trigonometric Equations

6. Trigonometric Identities and More Equations

7. Non-Right Triangles

8. Vectors

9. Polar Equations

10. Parametric Equations

11. Graphing Complex Numbers

Default TOC

This trigonometry study guide covers the unit circle, radian measure, circular functions, Pythagorean identity, function values, and real-world applications.

Radian Measure and the Unit Circle: Circular Functions and Their Applications

Study Guide - Learn with Videos

Radians

Defining the Unit Circle

Trigonometric Functions on the Unit Circle

Common Values of Sine, Cosine, & Tangent

Reference Angles