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ATAN(x)

ATAN(x) 用于返回 x 的反正切,即正切为 x 的值

mysql> SELECT ATAN(0.30933624960962325), ATAN(1);+---------------------------+--------------------+| ATAN(0.30933624960962325) | ATAN(1)            |+---------------------------+--------------------+|                       0.3 | 0.7853981633974483 |+---------------------------+--------------------+

 

 

 

 

    

ATAN(x)