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Dave's Short Trigonometry Course
These notes are more of an introduction and guide than a full course. Topics covered includes: Applications of trigonometry, What is trigonometry?, Background on geometry, Angle measurement, Chords, Sines, Cosines, Tangents and slope, The trigonometry of right triangles, The trigonometric functions and their inverses, Computing trigonometric functions, The trigonometry of oblique triangles, Demonstrations of the laws of sines and cosines, Area of a triangle, Ptolemy’s sum and difference formulas and Summary of trigonometric formulas.
Author(s): David E. Joyce
NA Pages 
Trigonometry Handbook by Earl L Whitney
This note covers functions and special angles, Graphs of trig functions, Inverse trigonometric functions, Key angle formulas, Trigonometric identities and equations, Solving an oblique triangle, Polar coordinates, Polar functions and vectors.
Author(s): Earl L Whitney
114 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
Notes for Trigonometry by Dr. Randall Paul
This note describes the following topics: Angles, Trigonometric Functions, Acute Angles, Graphs of Sine and Cosine, Trigonometric Equations, Formulas, Complex Numbers, Trigonometric Geometry, Law of Sines and Cosines.
Author(s): Dr. Randall Paul
145 Pages