sinh(3) [osf1 man page]

sinh(3) 						     Library Functions Manual							   sinh(3)

NAME

       sinh, cosh, tanh - Hyperbolic functions

LIBRARY

       Math Library (libm.a)

SYNOPSIS

       #include <math.h>

       double  sinh   (double  x);  float  sinhf (float  x); long double sinhl	(long double x); double cosh  (double x); float  coshf (float  x);
       long double coshl  (long double x); double tanh	(double x); float  tanhf (float  x); long double tanhl	(long double x);

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       cosh():	XPG4

       sinh():	XPG4

       tanh():	XPG4

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

DESCRIPTION

       The sinh(), sinhf(), and sinhl() functions compute the hyperbolic sine of x.  Both sinh(x), sinhf(x), and sinhl(x) are defined as (exp(x) -
       exp(-x))/2.

       The  cosh(), coshf(),  and coshl() functions compute the hyperbolic cosine of x.  Both cosh(x), coshf(x), and coshl(x) are defined as (e**x
       + e**(-x))/2.

       The tanh(), tanhf(), and tanhl() functions compute the hyperbolic tangent of x.	Both tanh(x), tanhf(x), and tanhl(x) are defined as  (e**x
       - e**(-x))/(e**x + e**(-x)).

       The following table describes function behavior in response to exceptional arguments:

       --------------------------------------------------------------------
       Function 		  Exceptional Argument	  Routine Behavior
       --------------------------------------------------------------------
       sinh(), sinhf(), sinhl()   |x|>ln(2 * max_float)   Overflow

       cosh(), coshf(), coshl()   |x|>ln(2 * max_float)   Overflow
       --------------------------------------------------------------------

       The following table lists boundary values used by these functions:

       ---------------------------------------------------------------------
       Value Name	   Data Type   Hexadecimal Value   Decimal Value
       ---------------------------------------------------------------------
       ln(2 * max_float)   S_FLOAT     42B2D4FC 	   89.41599

			   T_FLOAT     408633CE8FB9F87E    710.475860073943
       ---------------------------------------------------------------------
       delim off

																	   sinh(3)

cosh(3M)						  Mathematical Library Functions						  cosh(3M)

NAME

       cosh, coshf, coshl - hyperbolic cosine function

SYNOPSIS

       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double cosh(double x);

       float coshf(float x);

       long double coshl(long double x);

DESCRIPTION

       These functions compute the hyperbolic cosine of their argument x.

RETURN VALUES

       Upon successful completion, these functions return the hyperbolic cosine of x.

       If  the	correct  value would cause overflow, a range error occurs and cosh(), coshf(), and coshl() return the value of the macro HUGE_VAL,
       HUGE_VALF, and HUGE_VALL, respectively.

       If x is NaN, a NaN is returned.

       If x is +-0, 1.0 is returned.

       If x is +-Inf, +-Inf is returned.

       For exceptional cases, matherr(3M) tabulates the values to be returned by cosh() as specified by SVID3 and XPG3.

ERRORS

       These functions will fail if:

       Range Error    The result would cause an overflow.

		      If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, the overflow floating-point exception is raised.

		      The cosh() function sets errno to ERANGE if the result would cause an overflow.

USAGE

       An application wanting to check for exceptions should call feclearexcept(FE_ALL_EXCEPT) before  calling	these  functions.  On  return,	if
       fetestexcept(FE_INVALID	|  FE_DIVBYZERO  |  FE_OVERFLOW  |  FE_UNDERFLOW) is non-zero, an exception has been raised. An application should
       either examine the return value or check the floating point exception flags to detect exceptions.

       An application can also set errno to 0 before calling cosh(). On return, if errno is non-zero, an  error  has  occurred.  The  coshf()  and
       coshl() functions do not set errno.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       acosh(3M), feclearexcept(3M), fetestexcept(3M), isnan(3M), math.h(3HEAD), matherr(3M), sinh(3M), tanh(3M), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 							  cosh(3M)