Homework Statement
Determine φ''(x0), φ'''(x0), and φ(4)(x0) for the given point x0 if y=φ(x) is a solution of the given initial value problem.
y'' + (sinx)y' + (cosx)y = 0 y(0) = 0; y'(0) = 1
Homework Equations
y = φ(x) = Ʃan(x-x0)n
The Attempt at a Solution
I started off by...