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Returns the arc-cosine, in radians, of a numeric expression.
ACOS( numeric-expression )
numeric-expression The cosine of the angle.
This function converts its argument to DOUBLE, performs the computation in double-precision floating point, and returns a DOUBLE as the result.
SQL/2003 Vendor extension.
The following statement returns the arc-cosine value for 0.52.
SELECT ACOS( 0.52 );
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