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 May 7 awarded Popular Question Jul 25 awarded Popular Question Jul 2 awarded Curious Mar 8 awarded Yearling May 27 awarded Nice Question May 5 comment Customize startup @Mr. Wizard in fact, the documentation says: A notebook with the option setting Saveable->False can always be saved using the Save As menu item, but does not respond to Save and does not prompt for saving when it is closed. May 5 revised Customize startup added 46 characters in body May 5 comment Customize startup @Mr.Wizard Mathematica doesn't prompt me to do save the file on closing but when i open this notebook, it is in fullscreen mode and with the right magnification,as desired and what do you exactly mean with "change the properties to maximized". May 5 revised Customize startup added 15 characters in body May 5 awarded Commentator May 5 comment Customize startup Selecting "Full" under Notebook Options/Windows properties/Windows size does nothing but the magnification worked well. May 5 asked Customize startup Apr 19 awarded Nice Question Mar 28 comment Trying to prove that $x\sin(\frac{\pi}{x})\ge\pi \cos(\frac{\pi}{x})$ for $x\ge 1$ @Jens thank you very much, Mathematica seems a tricky tool for proving theorems. Mar 28 accepted Trying to prove that $x\sin(\frac{\pi}{x})\ge\pi \cos(\frac{\pi}{x})$ for $x\ge 1$ Mar 28 comment Trying to prove that $x\sin(\frac{\pi}{x})\ge\pi \cos(\frac{\pi}{x})$ for $x\ge 1$ @Jens You are the only one that understood me. Your approach is good but not fully correct since Tan[Pi/x]>=Pi/x is not true for all x > 1. I tried Resolve[ForAll[x, x > 1 && (0 < x < \[Pi]/2 \[Implies] Tan[x] > x), f'[x] >= 0] ] but didn't work. Maybe i'm asking too much from Mathematica. Can you make this work please? Mar 28 comment Trying to prove that $x\sin(\frac{\pi}{x})\ge\pi \cos(\frac{\pi}{x})$ for $x\ge 1$ This is indeed a neat solution to my problem, but my question wasn't too clear, i edited it. Mar 28 revised Trying to prove that $x\sin(\frac{\pi}{x})\ge\pi \cos(\frac{\pi}{x})$ for $x\ge 1$ added 335 characters in body Mar 28 awarded Critic Mar 28 asked Trying to prove that $x\sin(\frac{\pi}{x})\ge\pi \cos(\frac{\pi}{x})$ for $x\ge 1$