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)