已知sin（α+$\frac{\mathrm{\pi }}{8}$）cos（α+$\frac{\mathrm{\pi }}{8}$）=$\frac{\sqrt{3}}{4}$，α∈（$\frac{\mathrm{\pi }}{8}$，$\frac{\mathrm{\pi }}{4}$），cos（2β﹣$\frac{\mathrm{\pi }}{4}$）=$\frac{3}{5}$，β∈（$\frac{\mathrm{\pi }}{4}$，$\frac{\mathrm{\pi }}{2}$）．

（1）求sin（2α+$\frac{\mathrm{\pi }}{4}$）及cos（2α+$\frac{\mathrm{\pi }}{4}$）的值；

（2）求cos（2α+2β）的值．

A: Hello, is this Mr. Rogers?

B: Yes, it is.____

A: I'm from the package delivery company (快递公司); I have your package. Are you at home?
B: Unfortunately I'm at work right now. ____

A: Actually, this package needs your signature (签名). Can I bring it to your office instead?
B:____I don't have time to leave my desk.

A: I see.____

B: Yes, that would be better. Can you bring it to my home at 6 p.m.?

A: Sure, that is fine. ____

B: Great, thank you so much!

判断对错

两个数相除，商是5，那么其中一个数就是另一个数的倍数．