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三角函數with sine, cosine圖形

Author:吳汀菱, Eric Chang-Chien

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三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
找出對稱軸
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）

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鏡射矩陣 (CAS)
可积准则
門格海綿
角度、弧度互換
鉛筆畫圓

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