单词 cosiner 释义 ▪ I. cosine Trig.|ksan|[mod. f. co- prefix 4 + sine. The L. cosinus occurs in Gunther Canon Triangulorum (1620); F. cosine.]The sine of the complement of a given angle. (Abbrev. cos.)1635I. W. Sciographia 44 As the Radius Is to the cos...