单词 | cosine |
释义 | cosine[ koh-sahyn ] / ˈkoʊ saɪn / nounTrigonometry.
Mathematics. (of a real or complex number x) the function cos x defined by the infinite series 1 − (x2/2!) + (x4/4!) − + …, where ! denotes factorial. Abbreviation: cosCompare sine (def. 3), factorial (def. 1). Origin of cosine1625–35; <New Latin cosinus. See co-, sine Words nearby cosinecosign, cosignatory, cosigner, Cosimo, Cosimo I, cosine, COSLA, cos lettuce, cosm-, cosmeceutical, Cosmegen Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for cosineBritish Dictionary definitions for cosinecosine / (ˈkəʊˌsaɪn) / noun (of an angle)a trigonometric function that in a right-angled triangle is the ratio of the length of the adjacent side to that of the hypotenuse; the sine of the complementAbbreviation: cos Word Origin for cosineC17: from New Latin cosinus; see co-, sine 1 Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for cosinecosine [ kō′sīn′ ] The ratio of the length of the side adjacent to an acute angle of a right triangle to the length of the hypotenuse. The abscissa of the endpoint of an arc of a unit circle centered at the origin of a Cartesian coordinate system, the arc being of length x and measured counterclockwise from the point (1, 0) if x is positive or clockwise if x is negative. A function of a number x, equal to the cosine of an angle whose measure in radians is equal to x. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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