cosh(3I)

NAME
     COSH, DCOSH, QCOSH - Computes hyperbolic cosine

SYNOPSIS
     COSH ([X=]x)
     DCOSH ([X=]x)
     QCOSH ([X=]x)

IMPLEMENTATION
     UNICOS, UNICOS/mk, IRIX systems

     CF90, MIPSpro 7 Fortran 90, MIPSpro Fortran 77

STANDARDS
     Fortran

     Fortran extension:  QCOSH

DESCRIPTION
     COSH is the generic function name; the others are specifics.  COSH,
     DCOSH, and QCOSH are elemental intrinsic functions.  These are
     elemental functions.  They accept the following argument:

     x         Must be of type real.  The type and kind type of x is
               identical to the type and kind type of the return value.
               See the RETURN VALUES section for more information on input
               data types and return values.
                                              x    -x
     These functions evaluate y = cosh(x) = (e  + e  ) / 2.

NOTES
     The COSH and DCOSH intrinsic function names can be passed as
     arguments; the other cannot.

     On CRAY T90 systems that support IEEE arithmetic, the following return
     values occur:

          COSH(x) = infinity if |x| > 709.78

          COSH(x) = NaN if x = NaN

RETURN VALUES
     COSH returns the single-precision real hyperbolic cosine of its
     single-precision real argument.

     DCOSH returns the double-precision real hyperbolic cosine of its
     double-precision real argument.

     QCOSH returns the quad-precision real hyperbolic cosine of its
     quad-precision real argument.

SEE ALSO
     Intrinsic Procedures Reference Manual for the printed version of this
     man page.