Posted by soffy on Monday, June 4, 2012 at 8:18am.
find the taylor series f(x)1/2(e^x + e^x) ;x=0

calculus  Steve, Monday, June 4, 2012 at 10:25am
since this is just f(x) = cosh(x), and the derivatives are sinh,cosh,sinh,cosh,...
f(x) = 1 + x^2/2! + x^4/4! + x^6/6! + ...