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.

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