Returns the complex hyperbolic cosine of its argument.

    This function is supported on OpenVMS Integrity servers and
    Alpha only.

    Format

      #include  <complex.h>

      double complex ccosh  (double complex z);

      float complex ccoshf  (float complex z);

      long double complex ccoshl  (long double complex z);

1 - Argument

 z

    A complex value.

2 - Description

    The ccosh functions return the complex hyperbolic cosine of z.

3 - Return Values

    x                  The complex hyperbolic cosine value.