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+//Example_a_6_1 page no:233
+clc;
+Vmag=250;
+Vang=100;
+Imag=15;
+Iang=30;
+theta=100-30;
+pf=cosd(theta);
+active_power=(Vmag/sqrt(2))*(Imag/sqrt(2))*pf;
+reactive_power=(Vmag/sqrt(2))*(Imag/sqrt(2))*sind(theta);
+apparent_power=(Vmag/sqrt(2))*(Imag/sqrt(2));
+disp(pf,"the power factor is ");
+disp(active_power,"the active power is (in W)");
+disp(reactive_power,"the reactive power is (in VAR)");
+disp(apparent_power,"the apparent power is (in VA)");
+//in text book reactive power calculation is wrong i.e 1761.9 is correct