m_v1=50;
m_v2=30;
m_v3=75;
deg_v1=20*%pi/180;
deg_v2=50*%pi/180;
deg_v3=-80*%pi/180;
v1=m_v1*(cos(deg_v1)+%i*sin(deg_v1));
v2=m_v2*(cos(deg_v2)+%i*sin(deg_v2));
v3=m_v3*(cos(deg_v3)+%i*sin(deg_v3));
v=v1+v2+v3;
a=real(v);
b=imag(v);
m_v=sqrt(a^2+b^2);
deg_v=atan(b/a)*180/%pi;
disp("the the supply voltage (in V) has a magnitude of"); disp(m_v);
disp("with a phase angle (in degrees) of"); disp(deg_v);