matlab assignment 2

%for frequency 150 Hz
fs=8000;
A=1;
f=150;
t=0:127;
x1=A*sin(2*pi*f/fs*t);
subplot(2,3,1);
plot(t,x1);
xlabel('time');
ylabel('amplitude');
title('sinusoidal signal x1');


%for frequency 450 Hz
fs=8000;
A=1;
f=450;
t=0:127;
x2=A*sin(2*pi*f/fs*t);
subplot(2,3,2);
plot(t,x2);
xlabel('time');
ylabel('amplitude');
title('sinusoidal signal x2');


%for frequency 1500 Hz
fs=8000;
A=1;
f=1500;
t=0:127;
x3=A*sin(2*pi*f/fs*t);
subplot(2,3,3);
plot(t,x3);
xlabel('time');
ylabel('amplitude');
title('sinusoidal signal x3');

%for delaying in x1
y1=x1-20;
subplot(2,3,4)
plot(t,y1);
xlabel=('time');
ylabel=('amplitude');
title=('delayed signal');

% signal after adding x1 and x2
xadd= x1 + x2 ;
subplot(2,3,5);
plot(t,xadd);
xlabel=('time');
ylabel=('amplitude');
title=('result of addition of x1 and x2');


%multiply of signal x1 and x3
xmult=x1.*x3;
subplot(2,3,6);
plot(t,xmult);
xlabel=('time');
ylabel=('ampliude');
title=('result of multiplication of x1 and x3');