Plane and Spherical Trigonometry
by Elmer A. Lyman, Edwin C. Goddard
Publisher: Allyn and Bacon 1900
Number of pages: 157
A trigonometry textbook that treats the solution of triangles quite fully and elaborates analytical trigonometry. It covers angles, trigonometric functions, inverse functions, trigonometric equations and identities, triangles, spherical trigonometry.
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by D.R. Curtiss, E.J. Moulton - D. C. Heath And Company
The distinguishing features of this book are: a concise presentation of the fundamental part of plane trigonometry up to the solution of triangles; the use of five-place logarithms; a chapter on spherical trigonometry; a chapter on applications.
by David E. Joyce - Clark University
This website is a short introduction to Trigonometry by a professor at Clark University. It is very easy to follow, is full of animations and study problems for the reader to work through. You should already be familiar with algebra and geometry.
by Ted Sundstrom, Steven Schlicker - Grand Valley State University
This book is not just about mathematical content but is also about the process of learning and doing mathematics. The reader is expected to study the material in the book by working out examples rather than just reading about them.
by Carl Stitz, Jeff Zeager - Stitz Zeager Open Source Mathematics
Dr. Stitz and Dr. Zeager co-wrote this high-quality textbook that is within reach and accessible to the average college student. A quick glance at the table of contents shows that all the major topics of a college trigonometry course are included.