Rational Developer for System z
Enterprise COBOL for z/OS, Version 4.1, Language Reference


ACOS

The ACOS function returns a numeric value in radians that approximates the arccosine of the argument specified.

The function type is numeric.

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Format

>>-FUNCTION ACOS--(--argument-1--)-----------------------------><

argument-1
Must be class numeric. The value of argument-1 must be greater than or equal to -1 and less than or equal to +1.

The returned value is the approximation of the arccosine of the argument and is greater than or equal to zero and less than or equal to Pi.


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