Section : 3 Updated : 2022-12-15 Source : Linux man-pages 6.03 NAMEcatanh, catanhf, catanhl − complex arc tangents hyperbolic LIBRARYMath library (libm, −lm)SYNOPSIS#include <complex.h>double complex catanh(double complex z);
float complex catanhf(float complex z);
long double complex catanhl(long double complex z);DESCRIPTIONThese functions calculate the complex arc hyperbolic tangent of z. If y = catanh(z), then z = ctanh(y). The imaginary part of y is chosen in the interval [−pi/2,pi/2]. One has: catanh(z) = 0.5 * (clog(1 + z) − clog(1 − z))VERSIONSThese functions were added in glibc 2.1. ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7).
STANDARDSC99, POSIX.1-2001, POSIX.1-2008. EXAMPLES/* 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);
}SEE ALSOatanh(3),cabs(3),cimag(3),ctanh(3),complex(7)0 Johanes Gumabo Data Size : 9,664 byte man-catanhf.3Build : 2025-03-22, 13:26 : Visitor Screen : x Visitor Counter ( page / site ) : 31 / 2,271,663 Visitor ID : : Visitor IP : 216.73.216.210 : Visitor Provider : AMAZON-02 : Provider Position ( lat x lon ) : 39.962500 x -83.006100 : x Provider Accuracy Radius ( km ) : 20 : Provider City : Columbus : Provider Province : Ohio , : , Provider Country : United States : Provider Continent : North America : Visitor Recorder : Version : Visitor Recorder : Library : Online Linux Manual Page : Version : Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 25.03.22 Online Linux Manual Page : Library : lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40 Online Linux Manual Page : Library : lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40 Data Base : Version : Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38 Data Base : Library : lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36
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