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+//Example 7.12, Page no.280
+clear 
+clc
+
+theeta=5  //Angle form by slant ranges of two satellites
+dA=42100*10^3  //Slant range of satellite A
+dB=42000*10^3  //Slant range of satellite B
+r=42164*10^3   //radius of geostationary orbit
+beeta=((dA^2+dB^2-cosd(theeta)*2*dA*dB)/(2*r^2))
+beeta=ceil(beeta*10^3)/10^3
+beeta=(180/%pi)*acos(1-beeta)
+printf("Longitudinal separation between two satellites is %.3f°",beeta)