##### Synopsis

    #include <math.h>
    double sinh(double x);

##### Description

sinh calculates the hyperbolic sine of x.

##### Fast math library behavior

If |x| >~ 709.782, errno is set to EDOM and sinh returns HUGE_VAL.

##### IEC 60559 math library behavior

If x is +∞, -∞, or NaN, sinh returns |x|.
If |x| >~ 709.782, sinh returns +∞ or -∞ depending upon the sign of x.

##### Portability

sinh conforms to ISO/IEC 9899:1990 (C90) and ISO/IEC 9899:1999 (C99).