float asinhf(float x);
asinhf calculates the hyperbolic sine of x.
If |x| > ~88.7228, errnois set to EDOM and asinhf returns HUGE_VALF.
If x is +∞, ?∞, or NaN, asinhf returns |x|. If |x| > ~88.7228, asinhf returns +∞ or ?∞ depending upon the sign of x.