clc //variable initialisation Va=230 //Supply voltage in volts N1=1400 //speed in rpm N2=600 //speed in rpm N3=1400 //speed in rpm Vdrop=15//Voltage drop in Volts //solution Eb1=Va-15 Eb2=Eb1*(N2/N1) Va1=Eb2+Vdrop a2=acosd(Va1/Va) printf('\n\n The Firing Angle=%0.1f\n\n',a2)