HP 3000 Manuals

Compiler Library/XL Reference Manual

COSH (or COSH') 

COSH calculates the hyperbolic cosine of a real number.

Declaration 

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

Accuracy 

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Attributes 

Parameter:                A real number.

Result:                   A real number.

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

Error:                    If the argument is a NaN, there are two
                          possible actions.  If the INVALID trap is
                          enabled, the message "COSH(X): X=NaN" occurs.
                          Otherwise, the INVALID flag is set.  In either
                          case, a quiet NaN is returned.

                          If ABS(X) is >= 88.7196, the result cannot be
                          represented and the message "COSH(X) OVERFLOW"
                          occurs.  See Appendix A for more details.

MPE/iX 5.0 Documentation