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

tanh, tanhf, tanhl - hyperbolic tangent function

#include <math.h>

double tanh(double x);

float tanhf(float x);

long double tanhl(long double x);

Link with -lm.

The tanh() function returns the hyperbolic tangent of x, which is defined mathematically as sinh(x) / cosh(x).

SVID 3, POSIX, 4.3BSD, ISO 9899 (C99). The float and the long double variants are C99 requirements.

acosh(3), asinh(3), atanh(3), cosh(3), ctanh(3), sinh(3)

2002-07-27

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