Fourier transform of f(t) =
It is differentiational Property of F.T.
A voltage wave is v = 50 sin ωt. Its average value calculated over full one cycle is
Average of sinusoid over full cycle is zero.
δ(t - b) is a pulse function.
It is an impulse function occuring at t = b.
ROC of sequence x[n] = (3)n ∪[n] + (4)n ∪[- n - 1]
Fourier transform pair are
This is property of autocorrelation.
F[R1, 1 (t)] = s(f) where s(f) is Power spectral density.