Curtiss D.R., Moulton E.J. Essentials of Trigonometry with Applications

D.C. Heath And Company, 1942. — 190 p.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 and 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. This text, therefore, should not only meet the needs of students for whom trigonometry is mainly useful as an introduction to further courses in mathematics, but it should be especially valuable for those who are interested in applications.
The first five chapters are taken from the authors' text A Brief Course in Trigonometry with minor revision. In the next three chapters part of the material has been adapted from the same text and from the authors' Trigonometry, Plane and Spherical. Most of the last chapter is new.