General solution of ODE u''(x) = -beta^2 u(x)

Here are some notes explaining why u(x) = c_1 cos(beta*x) + c_2 sin(beta*x) is the general solution of the above ODE.

By Håkon Andreas Hoel
Published Feb. 9, 2024 7:02 PM - Last modified Feb. 10, 2024 9:53 AM