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

       cosh, coshf, coshl - hyperbolic cosine function

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

       double cosh(double x);

       float coshf(float x);

       long double coshl(long double x);

       These functions compute the hyperbolic cosine of their argument x.

       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.

       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.

       An application wanting to check for exceptions should  call  feclearex‐
       cept(FE_ALL_EXCEPT)  before  calling  these  functions.	On  return, if
       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.

       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‐

SunOS 5.11			  12 Jul 2006			      cosh(3M)

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