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A Semester Course in Trigonometry
This book has been written in a way that can be read by students. The chapters of this book are well suited for a one semester course in College Trigonometry. Topics covered includes: Equations and Inequalities, Geometry in the Cartesian System, Functions and Function Notation, Transformations of Graphs, Combining Functions, Inverse Functions, Angles and Arcs, Trigonometric Functions of Acute Angles, Trigonometric Functions of Any Angle, Trigonometric Functions of Real Numbers, Graphs of the Sine and Cosine Functions, Trigonometric Functions, Simple Harmonic Motion, Verifying Trigonometric Identities, Sum and Difference Identities, The Double-Angle and Half-Angle Identities, Conversion Identities, Inverse Trigonometric Functions and Trigonometric Equations.
Author(s): Marcel B. Finan
264 Pages 
This note explains the following topics: Basic Trigonometry, Applications to complex numbers, Applications to complex Geometry, Application to Planar Geometry, 3D Geometry and Trigonometric Substitution.
Author(s): Naman and Freeman
84 Pages
This PDF covers the following topics related to Trigonometry : Trigonometry – An Overview of Important Topics, Understand How Angles Are Measured, Degrees, Radians, Circle, Trigonometric Functions, Definitions of trig ratios and functions, Find the value of trig functions given an angle measure, Find a missing side length given an angle measure, Find an angle measure using trig functions, Using Definitions and Fundamental Identities of Trig Functions, Fundamental Identities, Sum and Difference Formulas, Double and Half Angle Formulas, Product to Sum Formulas, Sum to Product Formulas, Law of Sines and Cosines, Understand Key Features of Graphs of Trig Functions, Graph of the sine function, Graph of the cosine function, Key features of the sine and cosine function, Graph of the tangent function, Graphing Trigonometric Functions using Technology.
Author(s): Governors State University
62 Pages
Trigonometry by James D. Anderson
This book covers the following topics: Radian Angle Measurement, Definition of the Six Trigonometric Functions Using the Unit Circle ,Reference Angles, Coterminal Angles, Definition of the Six Trigonometric Functions Determined by a Point and a Line in the xy-Plane, Solving Right Triangles and Applications Involving Right Triangles, The Graphs of the Trigonometric Functions, The Inverse Trigonometric Functions, Solving Trigonometric Equations , Pythagorean and Basic Identities , Sum and Difference Formulas.
Author(s): James D. Anderson
NA Pages
This note explains the following topics: Foundations of Trigonometry, Angles and their Measure, The Unit Circle: Cosine and Sine, Trigonometric Identities, Graphs of the Trigonometric Functions, The Inverse Trigonometric Functions, Applications of Trigonometry, Applications of Sinusoids, The Law of Sines and cosines, Polar Form of Complex Numbers.
Author(s): Carl Stitz and Jeff Zeager
398 Pages