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+//Example 9_22 page no:391
+clc;
+//given data
+Wr=400;//power in watts
+Wy=-35;//power in  watts
+//calculating total acitve power
+T_active_pow=Wr+Wy;
+disp(T_active_pow,"the total active power is (in watts)");
+//calculting the power factor
+phi=atand(sqrt(3)*((Wr-Wy)/(Wr+Wy)));
+phi=cosd(phi);
+disp(phi,"the power factor is");
+//calculating the reactive power
+rec_pow=sqrt(3)*(Wr-Wy);
+disp(rec_pow,"the reactive power is (in VAR)");