How can i make this chart?

I'm a beginner, I can't make it identical. Can someone help me?

The expression is: cos(2*pi*t)*exp(-t)

Answer 1

[Chunru]

t = 0:0.1:5;
x = cos(2*pi*t).*exp(-t);
plot(t, x);
xlabel('t');
ylabel('x(t)');

[Ruxandra Ionescu]

Thx bro