Question

Find a particular solution to the nonhomogeneous differential equation y'' 4y = sec(2x) using variation of parameters.
1) y(x) = A sin(2x) + B cos(2x)
2) y(x) = A sec(2x) + B tan(2x)
3) y(x) = A cos(2x) + B sin(2x)
4) y(x) = A sec(2x) + B cos(2x)