Nantoka/余弦yú xiánTraditional: 餘弦余弦 (yú xián) is a Chinese word meaning “(math.) cosine”.Meanings1(math.) cosineCharacters in 余弦余yú · (literary) I; me弦xián · bow stringRelated words余生the remaining years of one's life业余in one's spare time其余the rest多余superfluous余地margin剩余remainder余(literary) I; me余extra余surname Yu弦bow string余下remaining残余remnantStudy Chinese with flashcards →