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III:平面坐標與向量

    標題 作者 回復/查看 最後發表
  第一個圓,把另一個圓的圓周長平分,求解未知數 k. weiye 2008-12-28 0 / 3672 2008-12-28 11:25 by weiye
  直線上動點到線外的兩圓上動點之距離和,求最小值 weiye 2008-12-28 0 / 4419 2008-12-28 11:16 by weiye
  三角不等式 vln0106 2008-12-18 2 / 4219 2008-12-22 13:21 by vln0106
  數形結合之不等式 chu1976 2008-12-14 0 / 3809 2008-12-14 00:46 by chu1976
  附件 附件 chu1976 2008-12-10 0 / 4597 2008-12-10 23:16 by chu1976
  箏形有外心嗎? ksjeng 2008-11-17 3 / 4101 2008-11-19 22:45 by weiye
  圓的外切四邊形必為菱形? ksjeng 2008-11-17 2 / 4922 2008-11-19 21:34 by ksjeng
  用托勒密求解圓內接四邊形 ksjeng 2008-11-16 3 / 4002 2008-11-18 00:37 by ksjeng
  為何依此法劃正五邊形,總會有誤差?! ksjeng 2008-11-17 2 / 7628 2008-11-17 23:47 by ksjeng
  向量法求三角形面積 ksjeng 2008-11-16 2 / 6774 2008-11-16 23:34 by ksjeng
  如何使用倍角公式與正弦定理求三角形形狀 ksjeng 2008-11-16 2 / 5444 2008-11-16 21:14 by ksjeng
  請教三角形求比例 ksjeng 2008-10-12 1 / 4680 2008-10-13 09:04 by weiye
  為何孟氏定理會有三種 ksjeng 2008-10-12 1 / 5423 2008-10-13 08:33 by weiye
  例題:平面向量,求極小值 weiye 2008-10-10 0 / 3712 2008-10-10 23:45 by weiye
  圓之極軸 chu1976 2008-10-2 1 / 4129 2008-10-5 17:15 by weiye
  向量題目,利用向量,證明不等式的題目. weiye 2008-9-15 0 / 5329 2008-9-15 17:14 by weiye
  向量內積 chu1976 2008-7-23 1 / 4439 2008-7-28 11:13 by futureyesi
  求重疊面積 chu1976 2008-6-21 1 / 4886 2008-6-24 09:38 by weiye
  三角函數,和差化積題,求 sin(pi/14) - sin(3*pi/14) + sin(5*pi/14) weiye 2008-6-23 0 / 4773 2008-6-23 22:47 by weiye
  半角公式 E-How 2008-6-14 1 / 4590 2008-6-16 18:38 by weiye
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