solving second order ode of simple pendulum
------------> function code
https://drive.google.com/file/d/1u5--WEkiXiR4K7HOKd3xC20_JyjlgE2H/view?usp=sharing
-------------> main program code
https://drive.google.com/file/d/1Q3NAiQsVxl5o1K-G-pJXQHHvRVt9qT57/view?usp=sharing