# The value of $\sin^{-1}\bigg(\sin\frac{3\pi}{5}\bigg)$ is ________________.
$\begin{array}{1 1} \frac{3 \pi}{5} \\ \frac{-3 \pi }{5} \\ \frac{2 \pi}{5} \\ \frac{-2\pi}{5} \end{array}$