ACOS()

函数说明

ACOS() 函数返回给定数值的余弦（用弧度表示）。

函数语法

> ACOS(number)

参数释义

示例

drop table if exists t1;
create table t1(a float,b int);
insert into t1 values(0.5,1);
insert into t1 values(-0.5,-1);
mysql> select acos(a),acos(b) from t1;
+--------------------+-------------------+
| acos(a)            | acos(b)           |
+--------------------+-------------------+
| 1.0471975511965976 |                 0 |
| 2.0943951023931957 | 3.141592653589793 |
+--------------------+-------------------+
2 rows in set (0.01 sec)