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ACOS

Returns the arc cosine of x, that is, the value whose cosine is x. Returns NULL if x is not in the range -1 to 1.

Syntax​

ACOS(x)

Arguments​

ArgumentsDescription
xThe angle, in radians.

Return Type​

A Float64 data type value.

Examples​

mysql> SELECT ACOS(1);
+---------+
| ACOS(1) |
+---------+
|       0 |
+---------+
1 row in set (0.01 sec)

mysql> SELECT ACOS(1.0001);
+--------------+
| ACOS(1.0001) |
+--------------+
|         NULL |
+--------------+
1 row in set (0.02 sec)