First published in the early 20th century, this book provides a comprehensive introduction to the principles of plane trigonometry. Written primarily for students of mathematics and science, it covers a wide range of topics, from basic trigonometric functions and identities to more advanced topics such as spherical trigonometry and the solution of triangles. The book is filled with clear and concise explanations, along with numerous worked examples and exercises, making it an invaluable resource for anyone looking to improve their understanding of this fundamental branch of mathematics.

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