Plane Trigonometry and Numerical Computation
by J.W. Young, F.M. Morgan
Publisher: The Macmillan Company 1919
Number of pages: 146
The material has been arranged in such a way that the first six chapters give the essentials of a course in numerical trigonometry and logarithmic computation. The remainder of the theory usually given in the longer courses is contained in the last two chapters.
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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 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 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.
by I. Todhunter - Macmillan and co
The present work contains all the propositions usually included under the head of Spherical Trigonometry, together with a large collection of examples for exercise. The examples have been selected from the University and College Examination Papers.