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SVG original of en:Image:Trigonometry triangle.png. Made by Tarquin. Date: 6 March 2004 (original upload date) Source: Transferred from to Commons. Author: The original uploader was Tarquin at English Wikipedia. Later versions were uploaded by Limaner at en.wikipedia. Other versions
A simple trigonometric triangle designed to show the parts of a right triangle. This triangle is also a 30-60-90 triangle. Date: 6 July 2007: Source: Own work: Author: TheOtherJesse: Other versions: Derivative works of this file: TrigonometryTriangle-lv.svg
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Trigonometry was still so little known in 16th-century northern Europe that Nicolaus Copernicus devoted two chapters of De revolutionibus orbium coelestium to explain its basic concepts. Driven by the demands of navigation and the growing need for accurate maps of large geographic areas, trigonometry grew into a major branch of mathematics. [27]
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 trigonometry is of great importance for calculations in astronomy, geodesy, and ...
English: Spherical trigonometry: the six cases that must be solved given three elements. Not all can be solved by using just cosine and sine rules. Cases 3 and 5 can be changed to case 7 and solved by Napier's analogies.
All of the right-angled triangles are similar, i.e. the ratios between their corresponding sides are the same. For sin, cos and tan the unit-length radius forms the hypotenuse of the triangle that defines them. The reciprocal identities arise as ratios of sides in the triangles where this unit line is no longer the hypotenuse.
Trigonometry (6 C, 100 P) Types of triangles (21 P) Pages in category "Triangle geometry" The following 39 pages are in this category, out of 39 total.