by Arnold Dresden
Publisher: John Wiley And Sons 1921
Number of pages: 130
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 ...
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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.
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. Many students find the video presentation helpful.
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 Florentin Smarandache - viXra.org
This book includes 255 problems of 2D and 3D Euclidean geometry plus trigonometry. The degree of difficulties of the problems is from easy and medium to hard. The solutions are at the end of each chapter. The book is especially a didactic material...