Sinhc
From specialfunctionswiki
The $\mathrm{sinhc}$ function is defined by $$\mathrm{sinhc}(z)=\dfrac{\mathrm{sinh}(z)}{z}.$$
The $\mathrm{sinhc}$ function is defined by $$\mathrm{sinhc}(z)=\dfrac{\mathrm{sinh}(z)}{z}.$$