Question $13$

A signal $x(t)$ is defined by $x(t)=7sin(3t-0\mathrm{.}5).$ Which one is a valid complex exponential representation for $x(t)?$

$x(t)=\{14e^{-j}{e}^{j3t}\}$

$x(t)=\{7e^{j3}{e}^{jt}\}$

$x(t)=\{7e^j{e}^{j3t}\}$

$x(t)=\{7e^{-j\frac{}{2}}{e}^{j3t}\}$