Given $\sin y=-\frac{1}{3}, \cos x=-\frac{2}{5}$ With $\frac{\pi}{2}<x<\pi$ And $\pi<y<\frac{3 \pi}{2}$ , Find the Exact Values for the Following:
-

Given $\sin y=-\frac{1}{3}, \cos x=-\frac{2}{5}$ with $\frac{\pi}{2}<x<\pi$ and $\pi<y<\frac{3 \pi}{2}$ , find the exact values for the following:
- $\sin (x+y)$