tanh(3) [freebsd man page]

TANH(3) 						   BSD 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 tangent 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'').

BSD
								  August 17, 2013							       BSD

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

NAME

     tanh, tanhf -- hyperbolic tangent function

LIBRARY

     Math Library (libm, -lm)

SYNOPSIS

     #include <math.h>

     double
     tanh(double x);

     float
     tanhf(float x);

DESCRIPTION

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

RETURN VALUES

     Upon successful completion, these functions return the hyperbolic tangent value.  The following may also occur:

	   1.	If x is +- 0, x is returned.

	   2.	If x is NaN, a NaN is returned.

	   3.	If x is positive infinity, a value 1 is returned; if x is negative infinity, -1 is returned.

	   4.	If x is subnormal, a range error can occur and x is returned.

SEE ALSO

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

STANDARDS

     The described functions conform to ISO/IEC 9899:1999 (``ISO C99'').

BSD
								September 18, 2011							       BSD