Math Numeric Functions MySQL Tutorial

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  4. ATAN(X) returns the arc tangent of X
mysql>
mysql> SELECT ATAN(2);
+-----------------+
| ATAN(2)         |
+-----------------+
| 1.1071487177941 |
+-----------------+
1 row in set (0.02 sec)
mysql> SELECT ATAN(-2);
+------------------+
| ATAN(-2)         |
+------------------+
| -1.1071487177941 |
+------------------+
1 row in set (0.00 sec)
mysql>