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

Short Answer

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