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Aug 9, 2022 at 6:08 vote accept Đào Thanh Oai
Jul 11, 2018 at 12:16 comment added Đào Thanh Oai I think optimal of $k \approx \tan\frac{\pi}{n}- \tan\frac{\pi}{n+2}$
Jul 11, 2018 at 11:44 comment added Iosif Pinelis So far, we don't even seem to have a good expression for the optimal $k$ covering the cases of $n=3$ and $n=4$.
Jul 11, 2018 at 2:25 comment added Đào Thanh Oai I check in long time, but I can not find the optimal formular of $k$
Jul 10, 2018 at 21:17 vote accept Đào Thanh Oai
Aug 9, 2022 at 6:08
Jul 10, 2018 at 20:50 comment added Đào Thanh Oai I will chesk by my computer now. Thank You very much.
Jul 10, 2018 at 19:52 history edited Iosif Pinelis CC BY-SA 4.0
added 53 characters in body
Jul 10, 2018 at 19:45 history answered Iosif Pinelis CC BY-SA 4.0