B bos1234 Member Joined Oct 9, 2006 Messages 491 Gender Male HSC 2007 Jun 3, 2007 #1 If you have book... cambridge book page 104 thanks bye Last edited: Jun 3, 2007
ssglain Member Joined Sep 18, 2006 Messages 445 Location lost in a Calabi-Yau Gender Female HSC 2007 Jun 4, 2007 #2 By distance formula, OA^2 = c^2 + c^2 = 2c^2. Therefore, OA = sqrt(2)c.