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     SINH(S)                   UNIX System V                   SINH(S)



     Name
          sinh, cosh, tanh - hyperbolic functions

     Syntax
          #include <math.h>

          double sinh (x)
          double x;

          double cosh (x)
          double x;

          double tanh (x)
          double x;

     Description
          The sinh, cosh, and tanh functions return, respectively, the
          hyberbolic sine, cosine and tangent of their argument.

     See Also
          matherr(S)

     Diagnostics
          The sinh and cosh functions return HUGE (and sinh may return
          -HUGE for negative x) when the correct value would overflow
          and set errno to ERANGE.

          These error-handling procedures may be changed with the
          function matherr(S).

     Standards Conformance
          cosh, sinh and tanh are conformant with:
          AT&T SVID Issue 2, Select Code 307-127;
          The X/Open Portability Guide II of January 1987;
          ANSI X3.159-198X C Language Draft Standard, May 13,
          1988;
          IEEE POSIX Std 1003.1-1988 with C Standard Language-
          Dependent System Support;
          and NIST FIPS 151-1.

                                             (printed 6/20/89)