def Preal(r,theta):
return(cos(4*theta)*r^4 +7*cos(3*theta)*r^3 + 5* cos(2*theta)*r^2 +6*cos(theta)*r +13)
Pimaginary(r,theta)=sin(4*theta)*r^4 +7*sin(3*theta)*r^3 + 5* sin(2*theta)*r^2 +6*sin(theta)*r +13
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Pimaginary(pi)
13 13 |
plot(Preal(10,theta),theta,0,2*pi)
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plot(Pimaginary(10,theta),theta,0,2*pi)
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parametric_plot((Preal(.1,theta),Pimaginary(.1,theta)),theta,0,2*pi)
/usr/local/sage-6.10/local/lib/python2.7/site-packages/sage/misc/decorat\ ors.py:550: DeprecationWarning: variable ranges to parametric_plot must be given as tuples, like (2,4) or (t,2,3) See http://trac.sagemath.org/7008 for details. return func(*args, **options) /usr/local/sage-6.10/local/lib/python2.7/site-packages/sage/misc/decorators.py:550: DeprecationWarning: variable ranges to parametric_plot must be given as tuples, like (2,4) or (t,2,3) See http://trac.sagemath.org/7008 for details. return func(*args, **options) 
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parametric_plot((Preal(1,theta),Pimaginary(1,theta)),theta,0,2*pi)
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parametric_plot((Preal(10,theta),Pimaginary(10,theta)),theta,0,2*pi)
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parametric_plot((Preal(5,theta),Pimaginary(5,theta)),theta,0,2*pi)
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parametric_plot((Preal(6.305,theta),Pimaginary(6.305,theta)),theta,.99*pi,pi)
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Preal(6.3,pi)
-1.38289999999994 -1.38289999999994 |
Pimaginary(6.3,pi)
13.0000000000000 13.0000000000000 |
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