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All published worksheets from http://sagenb.org

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t = var("t") a=4 b=1 tmini=0 tmaxi=10000*pi
a,b,tmini,tmaxi
(4, 1, 0, 10000*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), 0.0, 10*pi, rgbcolor=(1,0,0)) show(q1)
t = var("t") a=1/3 b=1 tmini=0 tmaxi=10000*pi
a,b,tmini,tmaxi
(1/3, 1, 0, 10000*pi)
h1 = lambda t: [ (a-b)*cos(t)+b*cos(((a-b)/b)*t), (a-b)*sin(t)-b*sin(((a-b)/b)*t) ]A q1 = parametric_plot(h1(t), 0.0, 10*pi, rgbcolor=(1,0,0)) show(q1)
t = var("t") a=4/3 b=1 tmini=0 tmaxi=10000*pi
a,b,tmini,tmaxi
(4/3, 1, 0, 10000*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), 0.0, 10*pi, rgbcolor=(1,0,0)) show(q1)
t = var("t") a=pi b=1 tmini=0 tmaxi=100000*pi
a,b,tmini,tmaxi
(pi, 1, 0, 100000*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), 0.0, 10*pi, rgbcolor=(1,0,0)) show(q1)