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-1/8 ≤ cosα cosβ cosγ ≤ 1
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
球體建築師
找出對稱軸
三位數除以一位數（二）
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
Discover Resources
拋物線
高中選修-數學(甲)2-3積分的意義-黎曼和
纏繞SEQUENCE版
tesselation
了解圓方程(2)的副本
Discover Topics
Hypothesis Testing
Planes
Constructions
Differential Equation
Bar Chart or Bar Graph