| 释义 |
sine/saɪn ||; saɪn/noun [c] (abbr sin) (mathematics数学) the ratio of the length of the side opposite one of the angles in a right-angled triangle (= a triangle with one angle of 90°) to the length of the longest side 正弦（三角函数之一，指直角三角形某锐角的对边与斜边之比） ☞compare cosine and tangent. 与cosine及tangent比较。 |