cosh man page on SmartOS

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```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  feclearex‐
cept(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			   │
└─────────────────────────────┴─────────────────────────────┘

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

SunOS 5.11			  12 Jul 2006			      cosh(3M)
```
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