How to i plot curve graph for equation with condition?

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i want to plot this equation into graph.. but i only got a straight line..
a=3;
l=0.15;
m=0.5;
D=0.4;
wn=sqrt(9.81/l);
t = 0:0.05:(a*pi/wn);
x0=(D/2)*(1-cos(wn/a)*t);
plot(t,x0)
attached with me is graph i want to visualize...

Answers (1)

langrg
langrg on 22 Jan 2021
A parenthesis is missing in your formula (look your print), there is an closing parenthesis after "t", but there is no opening parenthesis associated.
I've tried this, that seems to work:
a=3;
l=0.15;
m=0.5;
D=0.4;
wn=sqrt(9.81/l);
t = 0:0.05:(a*pi/wn);
x0=(D/2)*(1-cos((wn/a)*t));
plot(t,x0);

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