real and imag parts plots

how i plot real part and imag part for the first 16 harmonics for x(t) ;(k = 0,1,2...,14,15). for this signal x(t) = cos(t/4)+cos(3*t/4)

Answer 1

[Monisha Nalluru]

For my understanding you want to plot the above equation for t=0,1,2,3,...,15

There is no imaginary part for above equation so

As an example code

t = linspace(0,15,16);
x = cos(t/4)+cos(3*t/4);
plot(t, x, 'b-', 'LineWidth', 2);
xlabel('t', 'FontSize', 20);
ylabel('x', 'FontSize', 20);