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Cardiod: r=1-cos(θ-π/2)
Author:
jwshen
GeoGebra
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三角函数 的副本
双心四边形
第八周作业2
盈利與虧蝕
斐波那契螺旋弧线（表格法-可动态调节）
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y=a(x-h)²+k的圖形
牛頓定理二
倫敦滾石橋2
數學傳播39卷4期, 平面幾何公式思考
銳角三角：sin, cos
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Probability
Rhombus
Arithmetic Operations
Diagrams
Linear Programming or Linear Optimization