Rheticus (Georg Joachim Von Lauchen)
1514-1574
German mathematician whose Narratio prima (1540) was the first published account of Nicolaus Copernicus's work.
A disciple of Copernicus, Rheticus was instrumental in convincing him to publish De revolutionibus (1542). Rheticus also was first to relate trigonometric functions to angles rather than arcs of circles; prepared the best trigonometric tables of his time, which contained values for sines, tangents, secants, and their complementary functions to ten decimal places; and wrote a biography of Copernicus which has since been lost.
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