First published in 1867, this classic textbook on plane trigonometry is an essential resource for any student of mathematics or engineering. With clear explanations, practical examples, and a wealth of exercises and problems, the book provides a thorough introduction to the principles of trigonometry and their applications in surveying, measurement, and more. Whether you're a high school student or a professional engineer, Elements of Plane Trigonometry is an indispensable guide to this foundational branch of mathematics. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.