Open Trigonometry: Basic to Advanced
Publisher: Wikibooks 2014
Number of pages: 51
Book 1 is pre-calculus trigonometry. We assume the student is relatively new to algebra and do algebra step by step. Many of the pages have closely related free/YouTube videos at the Khan Academy. This is by design. Many students find the video presentation helpful with learning mathematical material.
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by Michael Corral - mecmath.net
A text on elementary trigonometry. Though designed for college students, it could also be used in high schools. The traditional topics are covered, but a more geometrical approach is taken than usual. Also, some numerical methods are discussed.
by Henry Bedingfield Goodwin - Longmans, Green, and Co.
This book was intended to serve as an introduction to the study of Navigation and Nautical Astronomy for the junior officers under training in H.M. Fleet. The text plane trigonometry, spherical trigonometry, and the examples in the use of logarithms.
by Arnold Dresden - John Wiley And Sons
No attempt at logical completeness has been made, but rather has it been the author's aim to adapt the treatment to the stage of logical development which may be expected of students who begin the study of trigonometry ...
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.