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feather
on 3 Oct 2022
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t=0:0.01:pi;
x=1/100*(cos(t)).^9.*(cos(5*t)).^10+1/4*sin(2*t).*(1-1/2*(sin(10*t)).^2).*(1-(cos(t).*cos(3*t)).^8);
y=sin(t).*(1-1/5*(sin(10*t)).^2.*(1/2+(sin(2*t)).^2));
y=y-1/2;
plot(370*(x*cos(100)-y*sin(929)),10*(x*sin(100)+y*cos(100)));
axis off