标签：mysql log bsp pre -- nbsp mysq sql 弧度
COS(x) 用于返回 x 的余弦，其中 x 为弧度值
mysql> SELECT COS(0), COS(PI()), COS(1); +--------+-----------+--------------------+ | COS(0) | COS(PI()) | COS(1) | +--------+-----------+--------------------+ | 1 | -1 | 0.5403023058681397 | +--------+-----------+--------------------+
标签：mysql log bsp pre -- nbsp mysq sql 弧度
原文地址：http://www.cnblogs.com/pzk7788/p/6891904.html
