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ACOS(x)

ACOS(x) 用于返回 x 的反余弦,即余弦是 x 的值

mysql> SELECT ACOS(1), ACOS(0), ROUND(ACOS(0.5403023058681397));+---------+--------------------+---------------------------------+| ACOS(1) | ACOS(0)            | ROUND(ACOS(0.5403023058681397)) |+---------+--------------------+---------------------------------+|       0 | 1.5707963267948966 |                               1 |+---------+--------------------+---------------------------------+

 

 

 

 

    

ACOS(x)