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cosine n. 余弦 余弦 cosine 餘弦 cosine 餘弦 cosine n 1: ratio of the adjacent side to the hypotenuse of a right- angled triangle [synonym: {cosine}, {cos}] Cosine \Co"sine\ (k?"s?n), n. [For co. sinus, an abbrev. of L. complementi sinus.] (Trig.) The sine of the complement of an arc or angle. See Illust. of {Functions}. [1913 Webster] Cosmetic Cooperation for Open Systems Interconnection Networking in
Europe. A EUREKA project.
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