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+// FUNDAMENTALS OF ELECTICAL MACHINES 
+// M.A.SALAM 
+// NAROSA PUBLISHING HOUSE 
+// SECOND EDITION
+
+// Chapter 1 : REVIEW OF ELECRTIC CIRCUITS  
+// Example : 1.12
+
+clc;clear; // clears the console and command history 
+
+
+// Given data
+P = 120        // total power in kW
+cos_teta = 0.6 // power factor 
+
+// caclulations 
+teta = acosd(0.6)           // power factor angle
+P_1 = tand(teta)*P/sqrt(3)
+P_2 = (P_1+P)/2           // second wattmeter reading in kW
+
+// display the result 
+disp("Example 1.12 solution");
+printf(" \n Second wattmeter reading \n P_2= %.1f kW \n", P_2);
+