A Treatise On Spherical Trigonometry, by W.J. M'Clelland and T. Preston (Paperback) (ISBN-13: 9781021715616)

Written by two renowned mathematicians, this classic text covers the core concepts and formulas necessary for mastering spherical trigonometry. From the basics of the unit sphere to complex calculations involving multiple planes, this treatise provides a thorough and accessible introduction to this specialized branch of mathematics.

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