| 前页 | 后页 |
sinh
Hyperbolic sine.SYNOPSIS:
double x, y, sinh();
y = sinh(x);
DESCRIPTION:
Returns the hyperbolic sine of an argument in the range MINLOG to MAXLOG.
The range is partitioned into two segments. If |x| <= 1, a rational function of the form x + x**3 P(x)/Q(x) is employed.
Otherwise the calculation is sinh(x) = (exp(x) - exp(-x))/2.
ACCURACY:
Relative error:
arithmetic domain # trials peak rms
DEC +- 88 50000 4.0e-17 7.7e-18
IEEE +-MAXLOG 30000 2.6e-16 5.7e-17