![]() "Heavenly Mathematics" is illustrated throughout with stunning historical images and informative drawings and diagrams that have been used to teach the subject in the past. He conveys the sheer beauty of spherical trigonometry, providing readers with a new appreciation for its elegant proofs and often surprising conclusions. ![]() Glen Van Brummelen explores this exquisite branch of mathematics and its role in ancient astronomy, geography, and cartography Islamic religious rituals celestial navigation polyhedra stereographic projection and more. "Heavenly Mathematics" traces the rich history of this forgotten art, revealing how the cultures of classical Greece, medieval Islam, and the modern West used spherical trigonometry to chart the heavens and the Earth. The discipline was a mainstay of mathematics education for centuries, and it was a standard subject in high schools until the 1950s. Spherical trigonometry was at the heart of astronomy and ocean-going navigation for two millennia. ![]()
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