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+//Book name: Fundamentals of electrical drives by Mohamad A. El- Sharkawi
+//chapter 3
+//example 3.5
+//edition 1
+//publishing place:Thomson Learning
+clc;
+clear;
+Vsrms=110;//The voltage on the ac side in volts
+R=5;//Resistance value of the resistive load in ohm
+Vrms=55;//voltage across the load
+//iteration method
+xold=1;//assumed value 
+x=(180/%pi)*(2.25+(sind(2*xold)/2));
+err=100;//assumed value
+while(err>0.0001)
+    xnew=(180/%pi)*(2.25+(sind(2*x)/2));
+    x=xnew;
+    err=abs(xnew-xold);
+    xold=x;
+   end
+disp(x,'The triggering angle in degree is')
+P=(Vrms)^2/R;
+disp(P,'The load power in watt is:')
+//The answer given in the book is wrong