5.9. Find and sketch the Fourier transform of the following time-domain signals. (a)
Ae^(-\beta t)cos(\omega _(0)t)u(t),Re{\beta }>0
(b)
6sinc(0.5t)
(c)
Asin(\omega _(1)t)+Bcos(\omega _(2)t)
(d)
3rect[(t-2)/(6)]
(e)
4sin(50t)[u(t)-u(t-2)]
(f)
6tri[(t-3)/(4)]
(g)
9sinc^(2)(12t)