# plotting for cosine wave

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Ali Roshanzamir on 4 Aug 2020
Commented: Ali Roshanzamir on 4 Aug 2020
Hey guys.
I need to plot this curve. The teta should be 90 and I neesd to plot it for teta 0~360. Can you please help me?
N=45;
teta=90;
Na1=2*N*cos(teta);
Nb1=2*N*cos(teta-30);
Nc1=2*N*cos(teta-60);
Na2=2*N*cos(teta-90);
Nb2=2*N*cos(teta-120);
Nc2=2*N*cos(teta-150);
plot(teta,Na1+Nb1+Nc1+Na2+Nb2+Nc2)
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### Answers (1)

Rafael Hernandez-Walls on 4 Aug 2020
I change some lines....
N=45;
theta=0:360; % range of values of theta
Na1=2*N*cosd(theta); % cosd for cos when you use degree
Nb1=2*N*cosd(theta-30);
Nc1=2*N*cosd(theta-60);
Na2=2*N*cosd(theta-90);
Nb2=2*N*cosd(theta-120);
Nc2=2*N*cosd(theta-150);
plot(teta,Na1+Nb1+Nc1+Na2+Nb2+Nc2)
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Ali Roshanzamir on 4 Aug 2020
Thank you very much. Actually I need a constant theta=90 and I need to plot it for 360 degree. I don't want the variable theta. If possible please consider this as well.
thanks

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