余弦
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}.
cosine n : ratio of the adjacent side to the hypotenuse of a right-angled triangle [syn: {cos}]
COSINE Cooperation for Open Systems Interconnection Networking in Europe. A EUREKA project.