Trigonometry for Beginners by John B. Lock - Free PDF

About this book :-
"Trigonometry for Beginners" by John B. Lock is a classic mathematics textbook designed for students new to "trigonometric ratios", providing a clear and structured introduction to the subject. First published in 1896, the book focuses on teaching fundamental concepts in a simple and accessible manner. It emphasizes understanding the relationships between angles and sides in triangles, making it easier for learners to solve trigonometric problems. Lock’s approachable style ensures that beginners can grasp even complex ideas without feeling overwhelmed. The book covers essential topics such as the "solution of triangles", both right-angled and oblique, and includes detailed explanations of logarithms and their use in trigonometric calculations. Additionally, Lock explores spherical trigonometry, introducing students to practical applications in navigation, astronomy, and surveying. Each chapter builds progressively, ensuring readers develop a strong foundation in trigonometric principles and problem-solving techniques. Despite being over a century old, Lock’s textbook remains relevant for learners seeking a traditional, methodical approach to trigonometry. Its focus on clarity, structured progression, and "practical applications" allows students to apply theoretical knowledge to real-world problems. Modern editions and reprints keep this classic accessible, making it a valuable resource for self-study, classroom learning, or anyone looking to strengthen their foundational skills in trigonometry.

Book Detail :-
Title: Trigonometry for Beginners by John B. Lock - Free PDF
Publisher: The MacMillan Company
Year: 1896
Pages: 236
Type: PDF
Language: English
ISBN-10 #: 0365398535
ISBN-13 #: 978-0365398530
License: Public Domain Work
Amazon: Amazon

About Author :-
The author John Bascombe Lock (1849–1921) was an English mathematician, academic, and priest known for his contributions to "trigonometry education". He studied at Gonville and Caius College, Cambridge, and later served as a fellow and bursar at the college. Lock also taught at Eton College and was active in community projects. He authored several influential "mathematics textbooks", including "Trigonometry for Beginners", which simplifies "trigonometric concepts" for students. His books focus on clarity, structured learning, and practical applications, helping learners understand trigonometric ratios, the solution of triangles, and real-world problem solving, making them valuable even today.

Book Contents :-
1. Definitions. The Figures of Trigonometry 2. Measurement of Angles 3. The Trigonometrical Ratios 4. The Acute Angle 5. The Trigonometrical Ratios of Certain Angles 6. Practical Applications 7. Use of Signs + and — , Definitions. The Trigonometric Ratios 8. On the Relations Between the Trigonometrical Ratios 9. The Solution of Trigonometrical Equations 10. On the Trigonometrical Ratios of Two or Mori Angles 11. Multiple Angles, Sub-multiple Angles 12. Inverse Trigonometric Functions 13. Relations between the Sides and Angles of a Triangle 14. Logarithms 15. Solution of Triangles. Area of a Triangle 16. Measurement of Heights and Distances 17. Miscellaneous Theorems 18. Relations Among the Sides and Angles of a Spherical Triangle 19. Solution of Spherical Triangles . 20. The Solution of Trigonometrical Equations 21. On the Trigonometrical Ratios of Two or More Angles 22. Multiple Angles & Submultiple Angles 23. Answers to Examples > 1

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