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Copy of 和差角公式几何证明

Author:jh-chou, 梁航宇

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拼砌四邊形
判斷球體
【案例】2018年全国1卷理科12题
【案例】2013年安徽高考15题
找出對稱軸

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任務1
Ladder on Wall
-3/2 ≤ cosα + cosβ + cosγ ≤ 3
折扣例3的副本
點和圓的位置關係的副本

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Square
Special Points
Rhombus
Ratios
Logarithmic Functions

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