回複：1.5 star star- finding road

來源: calligraphy 於 2010-03-13 17:06:23 [] [舊帖] [給我悄悄話] 閱讀數 : (292 bytes)

try to find the min value:
f(n)=100/cos(180/n)+200(n-1)tg(180/n).

This needs college level math. f ' (n) = blahblah. I am not sure my memorized formula is correct. I need google a little bit.

OR, we have to jump out of this logic to find some new trick to solve the problem.

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