HP 3000 Manuals

Compiler Library/XL Reference Manual

COS (or COS') 

COS calculates the cosine of a real number in radians.

Declaration 

     FUNCTION COS(VAR x:REAL):REAL; EXTERNAL;

Accuracy 


Attributes 

Parameter:                A real number in radians.

Result:                   A representable real number in the range [-1.0,
                          1.0].  See Chapter 1 for details on the
                          internal representation of real numbers.

HP FORTRAN 77/XL:         Intrinsic function:  Y=COS(X).

Error:                    If the argument is a NaN or an Infinity, there
                          are two cases.  If the INVALID trap is enabled,
                          the message "COS(X): X=NaN OR INFINITY" occurs.
                          Otherwise, the INVALID flag is set.  In either
                          case, a quiet NaN is returned.

MPE/iX 5.0 Documentation