sinh() - hyperbolic sine function
#include <math.h>
double sinh (double x)
The sinh(3) function computes the hyperbolic sine of x.
The sinh(3) function returns the hyperbolic sine value unless the magnitude of x is too large, in which case it sets errno
Sinh(3) can fail for the following reasons:
acos(3)
asin(3)
atan(3)
atan2(3)
cos(3)
cosh(3)
math(3)
sin(3)
tan(3)
tanh(3)