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式の計算の利用　図形の証明２

Author:井上直紀

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正１７角形　作図　regular 17-gon 2
円の伸開線
接点の作る円は内接円
フーリエ級数展開
等積変形2

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階差０項数列
かけ算の暗算
円周角２
リサージュ曲線
単位円を用いた三角比の値

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Addition
Tangent Function
Circumcircle or Circumscribed Circle
Volume
Solids or 3D Shapes

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