TANH(3) BSD Library Functions Manual TANH(3)NAME
tanh, tanhf — hyperbolic tangent functions
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
double
tanh(double x);
float
tanhf(float x);
DESCRIPTION
The tanh() and the tanhf() functions compute the hyperbolic tangent of x.
For a discussion of error due to roundoff, see math(3).
RETURN VALUES
The tanh() and the tanhf() functions return the hyperbolic tangent value.
SEE ALSOacos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), math(3), sin(3),
sinh(3), tan(3)STANDARDS
The tanh() function conforms to ISO/IEC 9899:1990 (“ISO C90”).
BSD May 2, 1991 BSD