catanh(3)                  Library Functions Manual                  catanh(3)

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       catanh, catanhf, catanhl - <?><?><?><?> <?><?><?><?>
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       #include <complex.h>

       double complex catanh(double complex z);
       float complex catanhf(float complex z);
       long double complex catanhl(long double complex z);

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       <?><?><?><?><?><?><?> <?><?><?><?><?><?> <?><?><?><?><?><?> <?><?> z.
       <?><?><?> <?><?><?> y = catanh(z)<?> <?><?><?> z = ctanh(y).
       <?><?><?><?><?><?> <?><?><?><?><?> <?><?><?><?><?><?><?> <?><?> y
       <?><?> <?><?><?><?><?><?> [-pi/2,pi/2].

       <?><?><?><?><?>:

           catanh(z) = 0.5 * (clog(1 + z) - clog(1 - z))

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       +------------+------------------------------------+--------------------+
       |<?><?><?><?><?><?><?>|<?><?><?><?><?>            | <?><?><?><?><?><?> |
       +------------+------------------------------------+--------------------+
       |catanh(),   | <?><?><?><?><?> <?><?><?><?><?><?> | MT-Safe            |
       |catanhf(),  |                                    |                    |
       |catanhl()   |                                    |                    |
       +------------+------------------------------------+--------------------+
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       C11, POSIX.1-2008.

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       glibc 2.1.  C99<?> POSIX.1-2001.

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       /* Link with "-lm" */

       #include <complex.h>
       #include <stdio.h>
       #include <stdlib.h>
       #include <unistd.h>

       int
       main(int argc, char *argv[])
       {
           double complex z, c, f;

           if (argc != 3) {
               fprintf(stderr, "Usage: %s <real> <imag>\n", argv[0]);
               exit(EXIT_FAILURE);
           }

           z = atof(argv[1]) + atof(argv[2]) * I;

           c = catanh(z);
           printf("catanh() = %6.3f %6.3f*i\n", creal(c), cimag(c));

           f = 0.5 * (clog(1 + z) - clog(1 - z));
           printf("formula  = %6.3f %6.3f*i\n", creal(f), cimag(f));

           exit(EXIT_SUCCESS);
       }

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       atanh(3), cabs(3), cimag(3), ctanh(3), complex(7)

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       <kde-l10n-ar@kde.org>.


<?><?><?><?><?> <?><?><?><?> <?><?><?><?><?> 6.18
                           8 <?><?><?><?><?><?> 2026                 catanh(3)