6 Dec 2020 Question of the Day /Posted Bystephen/Comments0 Find the Taylor Series expansion of $\cosh x$ at the point $a=0$ and show that the remainder convergences to zero over $\left(-r,r\right)$ regardless the size of $r$. https://mathsgrinds.ie/wp-content/uploads/2020/12/2020-11-15_17-38-02.mp4