In particular, if a complex harmonic signal with a sinusoidal component with amplitude |X| , angular frequency omega and phase arg(X) , where arg is the argument.
x(t) = Xe^{jomega t} = |X|e^{j(omega t + arg(X))}
where X = |X|e^{jarg(X)}
is input to a linear time-invariant system, then the corresponding component in the output is: