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4.3任意角的三角函數
Author:
user9429
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
球体的体积推导（优化版）
兩位數除以一位數（二）
拼砌四邊形
四邊形的特性
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線性組合
ma_test
拉面直径例题
波的叠加
认识方程
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Means
Piecewise Functions
Geometric Transformations
Functions
Intersection