M12.txt

clc; clear all; close all; t=0:0.001:1; x=input('enter frequency of modulating signal'); y=input('enter frequency of carrier signal'); a=zeros(1,length(t)); a=sin(2*pi*x*t); b=zeros(1,length(t)); b=cos(2*pi*y*t); subplot(3,1,1); plot(t,a); title('frequency of modulating signal'); subplot(3,1,2); plot(t,b); title('frequency of carrier signal'); z=a.*b; subplot(3,1,3); plot(t,z); title('frequency of modulated signal');