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特殊な正接の2倍角の視覚的理解
Author:
holon
GeoGebra
New Resources
正１７角形 作図 regular 17-gon 2
standingwave-reflection-fixed
接点の作る円は内接円
サイクロイド
standingwave-plus
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χ二乗分布の自由度
三角形の面積
展開図
数直線
三角比の拡張
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Addition
Secant Line or Secant
Root
Linear Functions
Isosceles Triangles