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n等分单位圆作正弦曲线
Author:
许亚平
Topic:
Trigonometric Functions
GeoGebra
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sanjiaohanshu
湖南省张毅郴数字教研工作室 logo
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Earth with coastline
近似值：有效數字
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高中數學函數圖形
test22
奠基
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C60足球模型（多边形）
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Right Triangles
Unit Circle
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Translation
Standard Deviation