$[\frac{0\mathrm{.}67}{1}$ Points$]$

ZILLDIFFEQMODAP$11M7\mathrm{.}3\mathrm{.}046.$

Find $f(t).$

$L^{-1}\{\frac{s{e}^{-\frac{s}{2}}}{s^2+4}\}$

$f(t)=$

dots $[\frac{0\mathrm{.}67}{1}$ Points$]$

ZILLDIFFEQMODAP$11M7\mathrm{.}3\mathrm{.}046.$

Find $f(t).$

$L^{-1}\{\frac{s{e}^{-\frac{s}{2}}}{s^2+4}\}$

$f(t)=$

dots