ACOSH
NAME SYNOPSIS DESCRIPTION ERRORS CONFORMING TO SEE ALSO
acosh - inverse hyperbolic cosine function
#include x);
The acosh() function calculates the inverse hyperbolic cosine of x; that is the value whose hyperbolic cosine is x. If x is less than 1.0, acosh() returns not-a-number (NaN) and errno is set.
EDOM
x is out of range.
SVID 3, POSIX, BSD 4.3, ISO 9899
asinh(3), atanh(3), cosh(3), sinh(3), tanh(3)
