Say you have use the Runge Kutta-4 (RK4) Method to solve a 2. order Differential Equation such as :

y”+5y’+y=Sin(x) y'(0)=-1 y(0)=1 h=.5 solve until y at x =1 |

Use the Numerical Made Easy app at TI89.com option F3 7 :

After entering just press ENTER

to view the solution:

It is very easy to solve approximate such 2. order Differential Equations using the Runge Kutta Method. Very easy and always right.

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