Hello.
I have a set of ODE where
1) \frac{dv_x}{dt}=\frac{q(t)B}{m}v_y
2) \frac{dv_y}{dt}=\frac{q(t)B}{m}v_x
3) \frac{dv_z}{dt}=0
Following the strategy to solve a simple harmonic oscillator,
I differentiate (1) to get
4) \frac{d^2v_x}{dt^2}=\frac{q(t)B}{m}\frac{dv_y}{dt}+q'(t)v_y...