SINH(3M)            RISC/os Reference Manual             SINH(3M)



NAME
     sinh, fsinh, cosh, fcosh, tanh, ftanh - hyperbolic functions

SYNOPSIS
     #include <math.h>

     double sinh(x)
     double x;

     float fsinh(float x)
     float x;

     double cosh(x)
     double x;

     float fcosh(float x)
     float x;

     double tanh(x)
     double x;

     float ftanh(float x)
     float x;

DESCRIPTION
     These functions compute the designated hyperbolic functions
     for double and float data types.

ERROR (due to Roundoff etc.)
     Below 2.4 ulps; an ulp is one Unit in the Last Place.

DIAGNOSTICS
     sinh and cosh return +infinity.  (and sinh may return
     -infinity.  for negative x) if the correct value would over-
     flow.

SEE ALSO
     math(3M)

AUTHOR
     W. Kahan, Kwok-Choi Ng














                        Printed 11/19/92                   Page 1