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空間中兩向量夾角

Author:羅驥韡 (Pegasus Roe)

New Resources

  • 【案例】2018年全国1卷理科12题
  • 兩位數除以一位數(二)
  • 找出對稱軸
  • 画直线等分三角形的面积
  • 兩組對邊相等的四邊形

Discover Resources

  • 多邊形上的自由動點
  • [問題] a² + b² = 1, (c-4)² + (d-2)² = 5,求 ad - bc 最大值?
  • How to draw a decagon with ruler and compasses?
  • 二倍角的正切公式的证明
  • 小立方体组合的三视图【输入框法】

Discover Topics

  • Mode
  • Ellipse
  • Expected Value
  • Geometry
  • Tangent Line or Tangent
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