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This version of the Book is not up-to-date with the latest changes, so it is recommended to read the book online when possible.

Introduction to Trigonometry

 * Introduction
 * Core concepts of trigonometry
 * Prerequisites and Basics
 * In simple terms
 * Radian and degree measures
 * The unit circle
 * Trigonometric Angular Functions
 * Quadratic Functions
 * Right angle trigonometry
 * Trigonometric identities
 * Graphs of Sine and Cosine Functions
 * Graphs of Other Trigonometric Functions
 * Inverse Trigonometric Functions
 * Applications and Models

Analytical Trigonometry

 * Using Fundamental Identities
 * Verifying Trigonometric Identities
 * Solving Trigonometric Equations
 * Sum and Difference Formulas
 * Multiple-Angle and Product-to-sum Formulas

Problems and Exercises

 * Sum into Product

Additional Topics in Trigonometry

 * Law of Sines
 * Law of Cosines
 * Solving Triangles
 * Vectors in the Plane
 * Vectors and Dot Products
 * Trigonometric Form of the Complex Number

Trigonometry References

 * Trigonometric Unit Circle and Graph Reference
 * Trigonometric Formula Reference
 * Trigonometric Identities Reference
 * Natural trigonometric functions of Primary Angles

Authors
Lmov, Evil saltine, JEdwards, llg, Programmermatt, Alsocal, Robinson0120 (Wikibooks Users)