acosh, acoshf, acoshl, asinh, asinhf, asinhl, atanh, atanhl, atanhf - inverse hyperbolic functions

Syntax	#include <math.h> double acosh (double x); double asinh (double x); double atanh (double x); C11 float acoshf (float x); float asinhf (float x); float atanhf (float x); long double acoshl (long double x); long double asinhl (long double x); long double atanhl (long double x); (Ende)
Description	These functions compute respectively the inverse hyperbolic cosine, the inverse hyperbolic sine and the inverse hyperbolic tangent for the argument x.
Return val.	acosh(), acoshf(), und acoshl():
	Arch( x )	if successful.
	0.0	if x < 1.0. errno is set to indicate the error.
	asinh(), asinhf(), asinhl():
	Arsh( x )	the function is always successful.
	atanh(), atanhf(), atanhl():
	Arth( x )	if successful.
	0.0	if | x| > 1.0. errno is set to indicate the error..
Fehler	acosh(), acoshf() und acoshl() will fail if:
	EDOM	x < 1.0.
	atanh(), atanhf() und atanhl() will fail if:
	EDOM	|x| > 1.0.
See also	cosh(), sinh(), tanh(), math.h.