Trigonometry Textbook

This 180-page textbook was written by Michael Corral and covers elementary trigonometry. This textbook is intended for "students who have completed courses in high-school algebra and geometry." The textbook is designed for college students but may be used in high school. Traditional topics are covered with a geometrical approach, some numerical methods are discussed, and a brief tutorial on using Gnuplot to graph trigonometric functions is included.

This textbook includes a table of contents and the following sections: Right Triangle Trigonometry, General Triangles, Identities, Radian Measure, Graphing and Inverse Functions, Additional Topics, Appendix A: Answers and Hints to Selected Exercises, Appendix B: Graphing with Gnuplot, GNU Free Documentation License, History, and Index. There are 495 exercises included.