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三角函數sine跟cosine
Author:
JUNWAYLIANG
GeoGebra
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【案例】2018年全国1卷理科12题
錐體建築師
拼砌四邊形
異分母分數減法
兩位數除以一位數（一）
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雙曲線規
正弦函数图像
fhft
Epicycloid
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Linear Regression
Kite
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