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特殊な正接の2倍角の視覚的理解
Author:
holon
GeoGebra
New Resources
standingwave-reflection
接点の作る円は内接円
standingwave
カージオイド
平均変化率
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わっかで楕円を作図An oval by string of a circle
複素数の計算１
チェバの定理２
ずらした円
二次曲線と離心率
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Percentages
Area
Linear Functions
Difference and Slope
Sine