you had already derived all the coefficients:
and got the x(t)=x=1+ {(2/3)*cos(6*pi*t)}+ {cos(4*pi*t)} + {(1/2)*cos(2*pi*t)}
I devided the x(t) into three parts like X1, X2, X3
first i plot individual plots like X1=(2/3)*cos(6*pi*t)
X2=cos(4*pi*t)
X3=(1/2)*cos(2*pi*t)
Matlab code for X(t):
clc;clear all;close all;
t=-3:0.01:3;
x1=(2/3)*cos(6*pi*t);
subplot(2,2,1)
plot(t,x1)
grid on
title('Plotting x1=(2/3)*cos(6*pi*t)')
x2=cos(4*pi*t);
subplot(2,2,2)
plot(t,x2)
grid on
title('Plotting x2=cos(4*pi*t)')
x3=(1/2)*cos(2*pi*t);
subplot(2,2,3)
plot(t,x3)
grid on
title('Plotting x3=(1/2)*cos(2*pi*t)')
x=1+(2/3)*cos(6*pi*t)+cos(4*pi*t)+(1/2)*cos(2*pi*t);
subplot(2,2,4)
plot(t,x)
grid on
title('plotting x(t)')
plots:
final
plot:
if any doubts please comment me.
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