cosh(3) [opendarwin man page]

COSH(3) 						   BSD Library Functions Manual 						   COSH(3)

NAME

     cosh -- hyperbolic cosine function

SYNOPSIS

     #include <math.h>

     double
     cosh(double x);

DESCRIPTION

     The coshf() function computes the hyperbolic cosine of x.

SPECIAL VALUES

     cosh(+-0) returns 1.

     cosh(+-infinity) returns +infinity.

SEE ALSO

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

STANDARDS

     The cosh() function conforms to ISO/IEC 9899:1999(E).

BSD
								 November 20, 2002							       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