Hello,

Please see picture below

The syntax form in my opinion is

`plot_function(t,dx_t,'dx(t) = x_0*w*cos(w*t + phi)')`

`plot_function(t,d2x_t,'d2x(t) = -x_0*w^2*sin(w*t + phi)')`

Hello,

Please see picture below

The syntax form in my opinion is

`plot_function(t,dx_t,'dx(t) = x_0*w*cos(w*t + phi)')`

`plot_function(t,d2x_t,'d2x(t) = -x_0*w^2*sin(w*t + phi)')`

Let’s check this and get back to you.

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