# Exerc_1.80
clear
for i=1:201
t(i) = (i-1)*30/200;
x1(i) = 3 * sin(30*t(i));
x2(i) = 3 * sin(29*t(i));
x(i) = x1(i)+x2(i);
endfor
plot(t,x);
xlabel('t');
ylabel('x');