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三角関数sinθ・cosθ・tanθの値と単位円
Author:
斎藤 幸弘
GeoGebra
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正17角形 作図 regular 17-gon
sine-wave
standingwave-plus
standingwave
アステロイド
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ピタゴラスの定理とその拡張
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中点の軌跡
a 投影図見取図
数II P193 問3
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Vectors 2D (Two-Dimensional)
Quadrilaterals
Parallelogram
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