ACOS(X) returns the arc cosine of X. : ACOS : Math Numeric Functions MySQL TUTORIALS

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ACOS(X) returns the arc cosine of X.


mysql>
ACOS(X)returns NULL if X is not in the range -1 to 1.
mysql>
mysql> SELECT ACOS(1);
+---------+
| ACOS(1) |
+---------+
|       0 |
+---------+
1 row in set (0.00 sec)

mysql> SELECT ACOS(0);
+-----------------+
| ACOS(0)         |
+-----------------+
| 1.5707963267949 |
+-----------------+
1 row in set (0.00 sec)

mysql>



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