TANH(3) - man page online | library functions

Hyperbolic tangent function.

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

NAME tanh, tanhf, tanhl - hyperbolic tangent function
SYNOPSIS #include <math.h> double tanh(double x); float tanhf(float x); long double tanhl(long double x); Link with -lm. Feature Test Macro Requirements for glibc (see feature_test_macros(7)): tanhf(), tanhl(): _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L; or cc -std=c99
DESCRIPTION These functions return the hyperbolic tangent of x, which is defined mathematically as: tanh(x) = sinh(x) / cosh(x)
RETURN VALUE On success, these functions return the 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 positive infinity (negative infinity), +1 (-1) is returned.
ERRORS No errors occur.
ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ┌─────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├─────────────────────────┼───────────────┼─────────┤ │tanh(), tanhf(), tanhl() │ Thread safety │ MT-Safe │ └─────────────────────────┴───────────────┴─────────┘
CONFORMING TO C99, POSIX.1-2001, POSIX.1-2008. The variant returning double also conforms to SVr4, 4.3BSD, C89.
SEE ALSO acosh(3), asinh(3), atanh(3), cosh(3), ctanh(3), sinh(3)
COLOPHON This page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at
2015-04-19 TANH(3)
This manual Reference Other manuals
tanh(3) referred by acosh(3) | asinh(3) | atanh(3) | cosh(3) | sinh(3)
refer to acosh(3) | asinh(3) | atanh(3) | attributes(7) | cosh(3) | ctanh(3) | feature_test_macros(7) | sinh(3)