This is merely to point out that this message has little to do with the
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On Sunday, February 5, 2017 at 12:27:51 AM UTC, HG wrote:
>
> Hi,
> I can't find where are the mistakes ?
> It says it's about floating ... It representes two waves
> Any help ?
> Best
> Henri
>
> var("ct omega t")
> y = function("y")(t)
> de = y + r*ct*diff(y,t) == sin(omega * t)
> des = desolve(de,[y,t]);des
> des2 = (des.substitute(ct == 0.1)).full_simplify()
> df(r,ct,omega,t) = des2
> r = 1000
> c = 0.5e-6
> f = 440
> omega = 2*pi*f
> pa =
> plot(sin(omega*t),(t,0,.005),rgbcolor=('#800000'),axes_labels=['time','v'])
>
> pb = plot(df(r,c,omega,t),(t,0,.005),rgbcolor=('#008000'))
> lbl = text("$f = %.0f Hz \,r = %.0f \Omega \, c = %.1f {\mu}f$"
> % (f,r,c*1e6),(.0025,1.2),fontsize=12,rgbcolor='black')
> show(pa+pb+lbl,figsize=(4,3))
>
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