Hi all,

Suppose that you want to solve x'(t)=f(x,t)   x(t0)=x0

The theory show that:

x(t+h)=x(t)+1/2*h*(F1+F2) where F1=f(x,t) and F2=f(x+F1,t+h)

SO I made procedure:

Hi all,

while studying this ODE

Hi all,

> deq := diff(theta(t), t, t) = -g*sin(theta(t))/L;

                           2                              

Hi all,

While solving a différential equation, I encounter an integral:

Hi all