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+//CHAPTER 2- STEADY-STATE ANALYSIS OF SINGLE-PHASE A.C. CIRCUIT
+//Example 49
+
+disp("CHAPTER 2");
+disp("EXAMPLE 49");
+
+//Given
+//voltage V=200 <30
+//current 20 <60 and 40 <-30
+
+//VARIABLE INITIALIZATION
+v=200;                         //in Volts
+angle_v=30;                    //in degrees
+I1=20;                         //in Amperes
+angle_I1=60;                  //in degrees
+I2=40;                         //in Amperes
+angle_I2=-30;                  //in degrees
+
+//SOLUTION
+//function to convert from polar form to rectangular form
+function [x,y]=pol2rect(mag,angle);
+x=mag*cos(angle*(%pi/180));    //to convert the angle from degrees to radians
+y=mag*sin(angle*(%pi/180));
+endfunction;
+[v_x,v_y]=pol2rect(v,angle_v);
+[I1_x,I1_y]=pol2rect(I1,angle_I1);
+[I2_x,I2_y]=pol2rect(I2,angle_I2);
+s1=v*I1;
+angle_s1=-angle_v+angle_I1;
+disp(sprintf("The apparent power in 1st branch is %d kVA",s1/1000));
+[s1_x,s1_y]=pol2rect(s1,angle_s1);
+disp(sprintf("The true power in 1st branch is %.3f kW",s1_x/1000));
+
+disp(" ");
+
+s2=v*I2;
+angle_s2=angle_v-angle_I2;
+disp(sprintf("The apparent power in 2nd branch is %d kVA",s2/1000));
+[s2_x,s2_y]=pol2rect(s2,angle_s2);
+disp(sprintf("The true power in 2nd branch is %d kW",s2_x/1000));
+I=(I1_x+I2_x)+(%i*(I1_y+I2_y)); //disp(I);
+
+//function to convert from rectangular form to polar form
+function [I,angle]=rect2pol(x,y);
+I=sqrt((x^2)+(y^2));           
+angle=atan(y/x)*(180/%pi);     //to convert the angle from radians to degrees
+endfunction;
+[I,angle]=rect2pol(real(I),imag(I));
+//disp(I);
+s=v*I;
+angle_s=angle_v-angle;
+disp(sprintf("The apparent power in the main circuit is %.3f kVA",s/1000));
+[p,q]=pol2rect(s,angle_s);
+disp(sprintf("The true power in the main circuit is %.3f kW",p/1000));
+
+//END
+
+
+
+
+