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Hipparchus (180-125 BC) was one of the astronomers of antiquity; worked with triangles that were inscribed in circles. As he was dealing frequently with triangles in the divine sphere, was called "the father of trigonometry". A basic problem was to assess the three angles and three sides of the triangle inscribed. The problem was: given a central angle AOB, find the length of chord AB. Hiparco tables constructed which related strings measurements of the sides of a triangle with an angle rope. These tables were devised to facilitate the calculation of the real problems of that time, as the distance between inaccessible points in astronomy. Tables strings evolved to the current format, which indicates the relationship between the sine of an acute angle and the ratio of the measures of two sides of a right triangle. That is, for an acute angle of a right triangle, the sine of this angle is the ratio of the opposite side as the length of the hypotenuse, a concept developed by Rheticus (1514-1574) (CROSSFIELD et al., 2004) Historically, the sine and cosine were introduced as ratios of sides of a right triangle. However, from a functional standpoint modern, it is more natural to consider the functions sine and cosine as functions defined on the unit circle (WU-YI HSIANG, 1993) SEARCH But you know what is a trigonometric cycle? How about some studying about and discuss in the next lesson ...
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Hiparh (180-125 BC) bio je jedan od astronoma iz antike, radio s trokutima koji su upisane u krug. Kao što je često bave s trokutima u božanske sfere, zvao "otac trigonometrije". Osnovni problem bio je utvrditi tri kuta i tri strane trokuta upisana. Problem je bio: s obzirom središnji kut AOB, naći duljinu AB akord. Hiparco tablice zgrada koja se odnosi žice mjerenja od strane trokuta s kutom konopa. Ove tablice su osmislili kako bi se olakšalo izračun stvarnih problema iz tog vremena, kao udaljenost između nedostupnih točaka u astronomiji. Stolovi žice evoluirala u tekućem obliku, što ukazuje na odnos između sinus gotovo mrtvog kuta, a omjer mjera dvije strane pravokutnog trokuta. To je, za gotovo mrtvog kuta u pravokutnom trokutu, sine ovog kuta je omjer suprotnoj strani kao i duljine hipotenuze, koncept razvijen od strane Rheticus (1514-1574) (Crossfield et al., 2004) Povijesno gledano, sinus i kosinus uvedeni su omjerima strane pravokutnog trokuta. Međutim, od funkcionalni stajališta moderne, što je prirodnije je razmotriti funkcije sinus i kosinus funkcija definirana kao na jediničnoj kružnici (WU-YI Hsiang, 1993) TRAŽI Ali znate što je trigonometrijske ciklus? Kako o nekim studiranje o tome i raspravljati u sljedeću lekciju ...