ACOS

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:
 
Function
ACOS(.75)
Result
41
 
Function
ACOS(PI/4)
Result
38