Essentials of Trigonometry with Applications
by D.R. Curtiss, E.J. Moulton
Publisher: D. C. Heath And Company 1942
Number of pages: 190
The distinguishing features of this book are (1) a concise presentation of the fundamental part of plane trigonometry up to the solution of triangles; (2) the use of five-place logarithms in the solution of triangles arid in other applications, with due allowance for the accuracy of data; (3) a chapter on spherical trigonometry; (4) a chapter on applications, which has been written to give essential preparation to those who may enter upon military or naval, service.
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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.
by Elmer A. Lyman, Edwin C. Goddard - Allyn and Bacon
A trigonometry textbook that treats the solution of triangles quite fully and elaborates analytical trigonometry. It covers angles, trigonometric functions, inverse functions, trigonometric equations and identities, triangles, spherical trigonometry.
by H. C. Playne - E. Arnold
The book gives the reader a working knowledge of elementary Trigonometry. The book contains many and varied examples to be worked out by the student. Many examples illustrate the use of Trigonometry in Mechanics, Physics and Analytical Geometry.
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.