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+// example 1.19<a>
+//determine whether the following signals are power or energy signal
+clc ;
+t =0:0.01:100;
+A=1;
+x=A*sin(t);
+P=(integrate('(A*sin(t))^2','t',-%pi,%pi))/(2*%pi);
+disp(P,'The power of the signal is:');
+E=(integrate('(A*sin(t))^2','t',-%pi,%pi));
+disp(E,'The energy is:');
+disp('As t tends to infinity energy also tends to infinity but power remains finite hence it is power signal');