osx man page for tanh

TANH(3) 						   BSD Library Functions Manual 						   TANH(3)

NAME
     tanh -- hyperbolic tangent function

SYNOPSIS
     #include <math.h>

     double
     tanh(double x);

     long double
     tanhl(long double x);

     float
     tanhf(float x);

DESCRIPTION
     The tanh() function computes the hyperbolic tangent of x.

SPECIAL VALUES
     tanh(+-0) returns +-0.

     tanh(+-infinity) returns +-1.

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

STANDARDS
     The tanh() function conforms to ISO/IEC 9899:2011.

BSD
								 December 11, 2006							       BSD