ATANH(3) Linux Programmer's Manual ATANH(3)[top]NAMEatanh, atanhf, atanhl - inverse hyperbolic tangent functionSYNOPSIS#include <math.h> double atanh(double x); float atanhf(float x); long double atanhl(long double x); Link withFeature Test Macro Requirements for glibc (see feature_test_macros(7)): atanh(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L; or cc -std=c99 atanhf(), atanhl(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L; or cc -std=c99-lm.DESCRIPTIONThe atanh() function calculates the inverse hyperbolic tangent of x; that is the value whose hyperbolic tangent is x.RETURN VALUEOn success, these functions return the inverse hyperbolic tangent of x. If x is a NaN, a NaN is returned. If x is +0 (-0), +0 (-0) is returned. If x is +1 or, a pole error occurs, and the functions return HUGE_VAL, HUGE_VALF, or HUGE_VALL, respectively, with the mathemati‐ cally correct sign. If the absolute value of x is greater than 1, a domain error occurs, and a NaN is returned.-1ERRORSSee math_error(7) for information on how to determine whether an error has occurred when calling these functions. The following errors can occur: Domain error: x less thanor greater than +1 errno is set to EDOM. An invalid floating-point exception (FE_INVALID) is raised. Pole error: x is +1 or-1errno is set to ERANGE (but see BUGS). A divide-by-zero float‐ ing-point exception (FE_DIVBYZERO) is raised.-1CONFORMING TOC99, POSIX.1-2001. The variant returning double also conforms to SVr4, 4.3BSD, C89.BUGSIn glibc 2.9 and earlier, when a pole error occurs, errno as set to EDOM instead of the POSIX-mandated ERANGE. Since version 2.10, glibc does the right thing.SEE ALSOacosh(3), asinh(3), catanh(3), cosh(3), sinh(3), tanh(3)COLOPHONThis page is part of release 3.65 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2010-09-11 ATANH(3)

List of man pages available for

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]

Polar

Member of Polar

Based on Fawad Halim's script.

....................................................................

Vote for polarhome |