# Tag Info

First of all, in order to have a Fourier transform, the original signal has to be multiplied by the unit step function: $$x(t)=e^{-t}u(t)$$ Giving indeed the transform: $$X(\omega)=\frac{1}{j\omega+1}$$ The way to plot a complex function on the frequency domain is by finding both its amplitude and its phase, and drawing one graph for each. For the ...