SQL/MySQL/Math/ACOS

Use ACOS

   <source lang="sql">

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

• /

select ACOS(0.45);

      </source>