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TANH(3) 	      DragonFly Library Functions Manual	       TANH(3)

NAME

tanh, tanhf, tanhl -- hyperbolic tangent functions

LIBRARY

Math Library (libm, -lm)

SYNOPSIS

#include <math.h> double tanh(double x); float tanhf(float x); long double tanhl(long double x);

DESCRIPTION

The tanh(), tanhf(), and tanhl() functions compute the hyperbolic tangent of x. For a discussion of error due to roundoff, see math(3).

RETURN VALUES

The tanh(), tanhf(), and the tanhl() functions return the hyperbolic tan- gent value.

SEE ALSO

acos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), ctanh(3), math(3), sin(3), sinh(3), tan(3)

STANDARDS

The tanh() function conforms to ISO/IEC 9899:1990 (``ISO C90''). DragonFly 4.1 August 17, 2013 DragonFly 4.1