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Start at both ends
Return the arc cosine of a number:
SELECT ACOS(0.25);The ACOS() function returns the arc cosine of a number.
Formula
The specified number must be between - 1 to 1, otherwise this function returns NULL.number )
Required. A numeric value
From MySQL 4.0
Return the arc cosine of a number:
SELECT ACOS(-0.8);❮ MySQL Functions