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-3/2 ≤ cosα + cosβ + cosγ ≤ 3
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
前提:α + β + γ = 0
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【案例】2013年安徽高考15题
畫出對稱圖形
第八周作业
判斷球體
【案例】圆柱体内放置一个大球六个小球
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ggggggg
約分的圖示
例子
ex_1
探索三角形外角定理
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Tree Diagrams
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