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TANH(3) | Linux Programmer's Manual | TANH(3) |
NAME¶
tanh, tanhf, tanhl - hyperbolic tangent functionSYNOPSIS¶
#include <math.h>double tanh(double x);float tanhf(float x);long double tanhl(long double x);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
_BSD_SOURCE || _SVID_SOURCE ||
_XOPEN_SOURCE >= 600 || _ISOC99_SOURCE ||
_POSIX_C_SOURCE >= 200112L;
or cc -std=c99
DESCRIPTION¶
The tanh() function returns 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.ERRORS¶
No errors occur.CONFORMING TO¶
C99, POSIX.1-2001. 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 3.44 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/.2010-09-20 |