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 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 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 Mara Landers, Brenda Meery - CK-12 Foundation
A comprehensive book on trigonometry. From the table of contents: Trigonometry and Right Angles; Circular Functions; Trigonometric Identities; Inverse Functions and Trigonometric Equations; Triangles and Vectors; Polar Equations and Complex Numbers.
by J. B. Lock - The MacMillan Company
Contents: Definitions. The Figures of Trigonometry; Measurement of Angles; Trigonometrical Ratios; Acute Angle; Trigonometrical Ratios of Certain Angles; Practical Applications; On the Relations between the Trigonometric Ratios; and more.