SINH(3M-SVR4)       RISC/os Reference Manual        SINH(3M-SVR4)



NAME
     sinh, sinhf, cosh, coshf, tanh, tanhf, asinh, acosh, atanh -
          hyperbolic functions

SYNOPSIS
     cc [flag ...] file ...  -lm [library ...]

     #include <math.h>

     double sinh (double x);

     float sinhf (float x);

     double cosh (double x);

     float coshf (float x);

     double tanh (double x);

     float tanhf (float x);

     double asinh (double x);

     double acosh (double x);

     double atanh (double x);

DESCRIPTION
     sinh, cosh, and tanh and the single-precision versions
     sinhf, coshf, and tanhf return, respectively, the hyberbolic
     sine, cosine, and tangent of their argument.

     asinh, acosh, and atanh return, respectively, the inverse
     hyperbolic sine, cosine, and tangent of their argument.

SEE ALSO
     matherr(3M).

DIAGNOSTICS
     sinh, sinhf, cosh, and coshf return HUGE (and sinh and sinhf
     may return -HUGE for negative x) when the correct value
     would overflow and set errno to ERANGE.

     acosh returns NaN and sets errno to EDOM when the argument x
     is less than 1.  A message indicating DOMAIN error is
     printed on the standard error output.

     atanh returns NaN and sets errno to EDOM if | x| > 1.  If |
     x| = 1, a message indicating SING error is printed on the
     standard error output; if | x| > 1 the message will indicate
     DOMAIN error.




                        Printed 11/19/92                   Page 1

SINH(3M-SVR4)       RISC/os Reference Manual        SINH(3M-SVR4)



     Except when the -Xc compilation option is used, these
     error-handling procedures may be changed with the function
     matherr.  When the -Xa or -Xc compilation options are used,
     HUGE_VAL is returned instead of HUGE and no error messages
     are printed.


















































 Page 2                 Printed 11/19/92