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Given sin⁡y=−25,cos⁡x=−13\sin y=-\frac{2}{5}, \cos x=-\frac{1}{3} With π2<x<π\frac{\pi}{2}<x<\pi And π<y<3π2\pi<y<\frac{3 \pi}{2} , Find the Exact Values for the Following:
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Question 1

Short Answer

Given sin⁡y=−25,cos⁡x=−13\sin y=-\frac{2}{5}, \cos x=-\frac{1}{3} with π2<x<π\frac{\pi}{2}<x<\pi and π<y<3π2\pi<y<\frac{3 \pi}{2} , find the exact values for the following:
- cos⁡(x−y)\cos (x-y)

Correct Answer:

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