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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

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This trigonometry study guide covers solving triangles using the Law of Cosines, with step-by-step examples and tips for choosing the right method.

Trigonometry Study Guide: Law of Cosines Explained

Solving Triangles Using the Law of Cosines

Law of Cosines

Solving Triangles Using the Law of Cosines

Study Guide - Learn with Videos

Law of Cosines