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All published worksheets from http://sagenb.org

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Image: ubuntu2004
t = var("t") a=20/19 b=1 tmini=0 tmaxi=40*pi
a,b,tmini,tmaxi
(20/19, 1, 0, 40*pi)
h1 = lambda t: [ (a-b)*cos(t)+b*cos(((a-b)/b)*t), (a-b)*sin(t)-b*sin(((a-b)/b)*t) ] q1 = parametric_plot(h1(t), tmini, tmaxi, rgbcolor=(1,0,0)) show(q1)