Excerpt from DrillBook in Trigonometry In 1881 a Treatise on Trigonometry was published under the joint authority of Professors Oliver, Wait, and Jones. In 1889 this book was rewritten and reissued under the same title and by the same authority. In all five editions have been printed. Professor Oliver died last March, and now that a new edition of the book is called for and many changes are proposed, it seems better, perhaps fairer towards him, to issue it under my single name. It may be regarded, then, both as a new edition of the older book, and as itself a new book. Among the more important changes are these: 1. The introduction, at the beginning, of a chapter on the Eight Triangle, treating it as the pupil has been accustomed to think of it in plane geometry, and without the complex notions of directed lines and angles. In this chapter he learns, also, how to use tables of trigonometric ratios and logarithms, and he gets some notion of the simpler applications of trigonometry to problems in surveying. 2. The second chapter, on the general properties of Plane Angles, follows more closely the general lines of the old treatise, but it differs widely in details: in particular, it makes a much freer use of projections. 3. The third chapter, on plane triangles, shows a more radical departure. The habit of writers on trigonometry seems to have been to give broad and general definitions of trigonometric ratios, and to prove generally the propositions that relate to plane angles, and then, when they come to discuss the properties of plane triangles, to forget all they had said before, and to fall back on the ratios of positive acute angles. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses stateoftheart technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully any imperfections that remain are intentionally left to preserve the state of such historical works.
About George William Jones
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Author  :  George William Jones 
Publisher  :  Forgotten Books 
Data Published  :  27 September 2015 
ISBN  :  1330482816 
EAN  :  9781330482810 
Format Book  :  PDF, Epub, DOCx, TXT 
Number of Pages  :  214 pages 
Age +  :  15 years 
Language  :  English 
Rating  : 
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