COT(X) returns the cotangent of X. : COT « Math Numeric Functions « MySQL Tutorial

1. MySQL Tutorial
2. Math Numeric Functions
3. COT

mysql>
mysql> SELECT COT(12);
+------------------+
| COT(12)          |
+------------------+
| -1.5726734063977 |
+------------------+
1 row in set (0.00 sec)

mysql> SELECT COT(0);
+--------+
| COT(0) |
+--------+
|   NULL |
+--------+
1 row in set (0.00 sec)

mysql>