plotting sin wave signal

Hi, I have the following signal, f(t) = sin(t), -(pi/2)<= t <= (pi/2), what is the code to plot it for three whole periods? Thank you for the help!

[Jimmy W]

Basically I can only see one cycle after I plot it using these codes:

clc
clear all

x = linspace(-pi/2 , pi/2);
y = abs(sin(x));
plot(x,y);

Answer 1

[Walter Roberson]

You defined -(pi/2)<= t <= (pi/2) . Your function does not have a definition outside of that one period, so it is not meaningful to plot it for multiple periods.

You could extend your definition:

x = linspace(-pi/2 , 5*pi/2);

[Jimmy W]

Thank you