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spherical trigonometry

noun

  1. the branch of trigonometry that deals with spherical triangles.

spherical trigonometry

noun

  1. the branch of trigonometry concerned with the measurement of the angles and sides of spherical triangles
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of spherical trigonometry1

First recorded in 1720–30

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spherical trianglesphericity

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