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+//Chapter 1
+//Ex1.14, page no 44
+// CTS Signal
+// Continuous Time Fourier Transforms of
+// Sinusoidal waveforms(a)sin(Wot)(b)cos(Wot)
+clear ;
+clc ;
+close ;
+// CTFT
+T1 = 2;
+T = 4* T1;
+Wo = 2* %pi /T;
+W = [-Wo ,0, Wo ];
+ak = (2* %pi *Wo*T1/ %pi )/ sqrt ( -1);
+XW = [-ak ,0, ak ];
+ak1 = (2* %pi*Wo*T1/%pi);
+XW1 =[ ak1 ,0, ak1 ];
+//displaying the given function
+figure
+a =gca();
+a.y_location="origin";
+a.x_location="origin";
+plot2d3('gnn',W,imag(XW),2);
+poly1=a.children(1).children(1) ;
+poly1.thickness =3;
+xlabel('W' );
+title( 'CTFT of sin(Wot ) ')
+//displaying the fourier Transform of the given function
+figure
+a =gca();
+a.y_location="origin";
+a.x_location="origin";
+plot2d3('gnn',W,XW1,5);
+poly1 =a.children(1).children(1) ;
+poly1.thickness = 3;
+xlabel('W' );
+title( 'CTFT of cos (Wot)')