Updated: 2021/Dec/3

CATAN(3) Library Functions Manual CATAN(3)NAMEcatan,catanf,catanl- complex arc tangent functionsSYNOPSIS#include<complex.h>double complexcatan(double complex z); float complexcatanf(float complex z); long double complexcatanl(long double complex z);DESCRIPTIONThese functions compute the complex arc tangent of z, with branch cuts outside the interval [- i, +i] along the imaginary axis.RETURNVALUESThese functions return the complex arc tangent value, in the range of a strip mathematically unbounded along the imaginary axis and in the interval [-pi/2, +pi/2] along the real axis.ERRORSNo errors are defined.SEEALSOctan(3), IEEE Std 1003.1-2001 ("POSIX.1") <complex.h>COPYRIGHTPortions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . NetBSD 9.99 January 29, 2013 NetBSD 9.99