asinh, asinhf, asinhl - inverse hyperbolic sine function
#include <math.h>
double asinh(double x);
float asinhf(float x);
long double asinhl(long double x);Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
These functions calculate the inverse hyperbolic sine of x;
that is the value whose hyperbolic sine is x.
On success, these functions return the inverse hyperbolic sine of
x.
If x is a NaN, a NaN is returned.
If x is +0 (-0), +0 (-0) is returned.
If x is positive infinity (negative infinity), positive
infinity (negative infinity) is returned.