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正切函数图像
Author:
吕胜
GeoGebra
New Resources
【案例】2013年安徽高考15题
拼砌四邊形
三位數除以一位數（二）
判斷球體
算柱 (兩位數)
Discover Resources
excenter of triangle
判斷柱體 8
旋轉體：Washer Method
夜市麻將2
堆垛
Discover Topics
Fractal Geometry
Hypergeometric Distribution
Rhombus
Logarithmic Functions
Arithmetic Operations