sinh(3M)                     (Math Libraries)                      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.



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   sinh(3M)                     (Math Libraries)                      sinh(3M)


         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.

















































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