catan man page on Pidora

Man page or keyword search:  
man Server   31170 pages
apropos Keyword Search (all sections)
Output format
Pidora logo
[printable version]

CATAN(3)		   Linux Programmer's Manual		      CATAN(3)

NAME
       catan, catanf, catanl - complex arc tangents

SYNOPSIS
       #include <complex.h>

       double complex catan(double complex z);
       float complex catanf(float complex z);
       long double complex catanl(long double complex z);

       Link with -lm.

DESCRIPTION
       The  catan()  function  calculates  the	complex	 arc tangent of z.  If
       y = catan(z), then z = ctan(y).	The real part of y is  chosen  in  the
       interval [-pi/2,pi/2].

       One has:

	   catan(z) = (clog(1 + i * z) - clog(1 - i * z)) / (2 * i)

VERSIONS
       These functions first appeared in glibc in version 2.1.

CONFORMING TO
       C99.

EXAMPLE
       /* Link with "-lm" */

       #include <complex.h>
       #include <stdlib.h>
       #include <unistd.h>
       #include <stdio.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 = catan(z);
	   printf("catan() = %6.3f %6.3f*i\n", creal(c), cimag(c));

	   f = (clog(1 + i * z) - clog(1 - i * z)) / (2 * i);
	   printf("formula = %6.3f %6.3f*i\n", creal(f2), cimag(f2));

	   exit(EXIT_SUCCESS);
       }

SEE ALSO
       ccos(3), clog(3), ctan(3), complex(7)

COLOPHON
       This  page  is  part of release 3.35 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://man7.org/linux/man-pages/.

				  2011-09-15			      CATAN(3)
[top]

List of man pages available for Pidora

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net