sinh(3M)                         DG/UX 5.4.2                        sinh(3M)


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 hyperolic
       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.

       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, HUGEVAL is returned instead of



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sinh(3M)                         DG/UX 5.4.2                        sinh(3M)


       HUGE and no error messages are printed.
























































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