Returns the arc cosine of an expression that represents a numerical value. The evaluated expression must return a value whose absolute value is less than or equal to 1.0. The value ACOS returns lies in the range [0, ], that is, 0 ACOS(x) .
Format
ACOS(x)
Argument
x
Any valid expression that evaluates to a real number.
Examples
The following examples illustrate the use of the ACOS function: