ASIN
asin
description
Syntax
DOUBLE asin(DOUBLE x)
返回x
的反正弦值,若 x
不在-1
到 1
的范围之内,则返回 nan
.
example
mysql> select asin(0.5);
+---------------------+
| asin(0.5) |
+---------------------+
| 0.52359877559829893 |
+---------------------+
mysql> select asin(2);
+-----------+
| asin(2.0) |
+-----------+
| nan |
+-----------+
keywords
ASIN