cacos(3)                   Library Functions Manual                   cacos(3)

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       cacos, cacosf, cacosl - <?><?><?><?><?><?><?><?><?>
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LIBRARY
       Math library (libm, -lm)

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       #include <complex.h>

       double complex cacos(double complex z);
       float complex cacosf(float complex z);
       long double complex cacosl(long double complex z);

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       <?><?><?><?><?> z. <?><?><?><?> y = cacos(z), <?><?> z = ccos(y).
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           cacos(z) = -i * clog(z + i * csqrt(1 - z * z))

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       <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?> <?> attributes(7).

       +----------------------------+----------------------------------------------------------+--------------------------+
       |<?><?><?><?><?><?><?><?><?> | <?><?><?><?><?><?><?>                                    | <?><?><?><?><?><?><?><?> |
       +----------------------------+----------------------------------------------------------+--------------------------+
       |cacos(), cacosf(), cacosl() | <?><?><?><?><?><?><?><?><?><?><?><?> <?> <?><?><?><?><?> | MT-Safe                  |
       +----------------------------+----------------------------------------------------------+--------------------------+
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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;
           double complex i = I;

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

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

           c = cacos(z);

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

           f = -i * clog(z + i * csqrt(1 - z * z));

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

           exit(EXIT_SUCCESS);
       }

<?><?>. <?><?><?><?><?>
       ccos(3), clog(3), complex(7)

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       <?><?><?><?><?><?> Azamat Hackimov <azamat.hackimov@gmail.com>, Dmitriy
       S. Seregin <dseregin@59.ru>, Dmitry Bolkhovskikh <d20052005@yandex.ru>,
       Katrin Kutepova <blackkatelv@gmail.com>, Yuri Kozlov
       <yuray@komyakino.ru> <?> <?><?><?><?> <?><?><?><?><?><?>
       <pavia00@gmail.com>

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       <?><?><?><?><?><?> <?><?> <man-pages-ru-talks@lists.sourceforge.net>.

Linux man-pages 6.06  31 <?><?><?><?><?><?><?> 2023 <?>.              cacos(3)