Talk:Sinhc function

The Maclaurin series for sinh(z)/z is $$\sum_{i=0}^\infty \frac{z^{2i}}{(2i+1)!}$$. This can be trivially derived from AMS 55 Equation 4.5.62. Where did the series in the article come from? Van.snyder (talk) 21:38, 22 April 2021 (UTC)