Paso 1

t=0:0.01:5;

y1=3*sin(2*pi*t);

y2=5*sin(2*pi*t);

y3=6*sin(2*pi*t);

t4=1:0.01:5;

y4=2.^t4;

plot(t,y1, 'r',t,y2,'y',t,y3,'g',t4,y4,'k');

axis([0 5 -7 30]);

grid on;

title('señales continuas');

xlabel('variable x');

ylabel('variable y');

paso 2

t=0:0.01:5;

y1=3*sin(2*pi*t);

y2=5*exp(i/2*pi*t);

y3=6*cos(2*pi*t);

t4=1:0.01:5;

y4=2.^t4;

subplot(2,2,1);

plot(y1);

axis([-5 500 -5 5]);

grid on;

title(' 1 señales continuas');

subplot(2,2,2);

plot(y2);

axis([-5 5 -5 5]);

grid on;

title(' 2 señales continuas');

subplot(2,2,3);

plot(y3);

axis([-8 300 -8 8]);

grid on;

title(' 3 señales continuas');

subplot(2,2,4);

plot(y4);

axis([-4 500 0 30]);

grid on;

title(' 4 señales continuas');

Paso 3

A=4;

f=1;

wo=2*pi*f;

t=0:0.001:1;

fase=pi/6;

senoidal=A*sin(wo*t+fase);

figure(1);

plot(t,senoidal);

cosenoidal=Acos*(wo*t+fase);

figure(2);

plot(t,cosenoidal);

Paso 4

A=4;

f=100;

T=1/f;

Tm=3*T;

wo=2*pi*T;

N=50;

Tao=Tm/N;

t=0:Tao:Tm;

fs=1/Tao;

df=fs/N;

fref=-fs/2:df:fs/2;

fase=pi/6;

senoidal=A*sin(wo*t+fase);

senoidal1=A*sin(wo*fref+fase);

senoidal2=A*sin(wo*t+fase);

senoidales=senoidal+senoidal2;

figure(1)

plot(t,senoidal,t,senoidales)