by P. Abbott, Michael Wardle · NTC Pub. Group · ISBN 9780844239439
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This concise Teach Yourself text provides a thorough, practical grounding in the fundamental principles of trigonometry, which any reader can apply to his or her own field. The text explores the use of calculators and contains worked examples and exercises (with answers) within each chapter.
Abbott Payson Usher was an American economic historian. The Society for the History of Technology (SHOT) has awarded the Abbot Payson Usher Prize, named in his honor, annually since 1961.
