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Introduction to Trigonometry from a Unit Circle
Author:
Lam Yat Chun
GeoGebra
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美國國旗 (Codex 版)
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近似值：有效數字
Fibonacci Clock
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Chapter02
立體 - 方位角及仰角
兩種畢氏定理的證明
三角函數的週期變化
函数的旋转与翻折动画
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Diagrams
Linear Functions
Dilation
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Histogram