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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)')