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Was (wer) ist spherical trigonometry - definition
Spherical trigonometry
BRANCH OF SPHERICAL GEOMETRY THAT DEALS WITH THE RELATIONSHIPS BETWEEN TRIGONOMETRIC FUNCTIONS OF THE SIDES AND ANGLES OF THE SPHERICAL POLYGONS.
Angle excess; Neper's circle; Neper's pentagon; Spherical triangle; Spherical excess; Spherical polygon; Spherical trig; Girard's Theorem; Girard's theorem; Spherical triangles; Napier Circle; ∹; Spherical Trigonometry; Spherical trigonometrical formulae; Napier's analogies; Spherical trigonometric identities; Spherical polygon area; Spherical area; Spherical trigonometrical
Spherical trigonometry is the branch of spherical geometry that deals with the metrical relationships between the sides and angles of spherical triangles, traditionally expressed using trigonometric functions. On the sphere, geodesics are great circles.
spherical triangle
BRANCH OF SPHERICAL GEOMETRY THAT DEALS WITH THE RELATIONSHIPS BETWEEN TRIGONOMETRIC FUNCTIONS OF THE SIDES AND ANGLES OF THE SPHERICAL POLYGONS.
Angle excess; Neper's circle; Neper's pentagon; Spherical triangle; Spherical excess; Spherical polygon; Spherical trig; Girard's Theorem; Girard's theorem; Spherical triangles; Napier Circle; ∹; Spherical Trigonometry; Spherical trigonometrical formulae; Napier's analogies; Spherical trigonometric identities; Spherical polygon area; Spherical area; Spherical trigonometrical
¦ noun a triangle formed by three arcs of great circles on a sphere.
History of trigonometry
![[[Guo Shoujing]] (1231–1316)](https://commons.wikimedia.org/wiki/Special:FilePath/Guo Shoujing-beijing.JPG?width=200 "[[Guo Shoujing]] (1231–1316)")
![Page from ''[[The Compendious Book on Calculation by Completion and Balancing]]'' by [[Muhammad ibn Mūsā al-Khwārizmī]] (c. AD 820)](https://commons.wikimedia.org/wiki/Special:FilePath/Image-Al-Kitāb al-muḫtaṣar fī ḥisāb al-ğabr wa-l-muqābala.jpg?width=200 "Page from ''[[The Compendious Book on Calculation by Completion and Balancing]]'' by [[Muhammad ibn Mūsā al-Khwārizmī]] (c. AD 820)")
![[[Menelaus' theorem]]](https://commons.wikimedia.org/wiki/Special:FilePath/Menelaus-thm.png?width=200 "[[Menelaus' theorem]]")
ASPECT OF HISTORY
History of trigonometric functions; Trigonometry in ancient Egypt
Early study of triangles can be traced to the 2nd millennium BC, in Egyptian mathematics (Rhind Mathematical Papyrus) and Babylonian mathematics. Trigonometry was also prevalent in Kushite mathematics.
Beispiele aus Textkorpus für spherical trigonometry
1. Pyongyang, February 1 (KCNA) –– Ryangdoui, a calculator which quickly and easily does complicated sums for solving formulae of spherical trigonometry was invented in the early 1850s in Korea.