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function [x,y]=polar_to_cart(r,theta)
theta=theta/180*%pi
x=r*cos(theta)
y=r*sin(theta)
endfunction
Vbc=-400*%i
Rl=1
[Sr,Sc]=polar_to_cart(10000,acos(0.8))
S=complex(Sr,Sc)
Vl=Vbc
Il=norm(S/(sqrt(3)*Vl)) ////////calculation mistake in book here
P=3*Il*Il*Rl
disp(P)
Van=norm(Vbc/sqrt(3))
Ia=Il*exp(-%i*acos(0.8))
omega=exp(%i*120/180*%pi)
Ib=Ia/omega
disp(Van,Ia,Ib)
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