by Ted Sundstrom, Steven Schlicker
Publisher: Grand Valley State University 2016
Number of pages: 442
This book is not just about mathematical content but is also about the process of learning and doing mathematics. The reader is expected to do more than read the book and is expected to study the material in the book by working out examples rather than just reading about them.
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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 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 Marcel B. Finan - Arkansas Tech University
The text represents a serious effort to produce exposition that is accessible to a student at the freshmen or high school levels. The chapters of this book are well suited for a one semester course in College Trigonometry.
by W. E. Paterson - Clarendon Press
In this book the trigonometrical ratios are introduced as functions of the angle. The trigonometrical properties of the single angle are treated fully in the early chapters, and the examples apply Trigonometry wherever it may be useful.