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Why is the graph of the parametric equation like this

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cgo
cgo 2017-11-7
关闭： MATLAB Answer Bot 2021-8-20
I am graphing r = [5cost, 5sint] from t = 1:3000. I was wondering why the graph shown is an annulus instead of a circle? I graphed the same for t = 1:0.1:300 and it shows a circle that is much thinner.
Any insights why this happens? They are both circular functions, supposedly without any thickness.

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KSSV
KSSV 2017-11-7
t = linspace(0,2*pi,100) ;
r = [5*cos(t) ; 5*sin(t)] ;
plot(r(1,:),r(2,:))

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