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Ptolemy is also credited with Ptolemy’s theorem for deriving trigonometric quantities, and the most correct value of π exterior of China until the medieval period, three.1416. Apollonius of Perga (c. 262–190 BC) made significant advances to the study of conic sections, displaying that one can acquire all three kinds of conic section by varying the angle of the aircraft that cuts a double-napped cone. He also coined the terminology in use right now for conic sections, namely parabola (“place beside” or “comparison”), “ellipse” (“deficiency”), and “hyperbola” (“a throw beyond”). His work Conics is among the finest identified and preserved mathematical works from antiquity, and in it he derives many theorems regarding conic sections that would show invaluable to later mathematicians and astronomers learning planetary movement, similar to Isaac Newton.

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