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角α与-α的正弦函数关系
Author:
lelove2212
验证：角α与-α的正弦函数关系
GeoGebra
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四邊形的特性
兩組對邊相等的四邊形
拼砌四邊形
找出對稱軸
長方體平面投影 (Codex版)
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画个图
SIN伸縮平移
学习科学计算器
作线段和角
空间几何体的表面积和体积
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Rational Numbers
Linear Regression
Random Experiments
Equations
Differential Equation