Use ACOS : ACOS « Math « SQL / MySQL

1. SQL / MySQL
2. Math
3. ACOS

Use ACOS

/*
mysql> select ACOS(0.45);
+-----------------+
| ACOS(0.45)      |
+-----------------+
| 1.1040309877476 |
+-----------------+
1 row in set (0.01 sec)


*/  
select ACOS(0.45);

           
       

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