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S5E3 用复数来处理几何变换
Author:
洋葱教研
GeoGebra
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盈利與虧蝕
三角函数 的副本
圓周公式的應用
垂直線的斜率
第八周作业3
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triangle
Introduction to Trigonometry from a Unit Circle
小數的認識（一）
伞骨架模型
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Parabola
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Tangent Function
Trigonometry
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