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数Ⅲ 定義（楕円）

Author:Ando Tatsuo

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sine-wave
目で見る立方体の2等分
接点の作る円は内接円
standingwave
standingwave-plus

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bridge is built
円周角の定理と接弦定理と円に内接する四角形
cos加法定理の内積を用いた証明
橢圓3-平行四邊形法
２次関数の最大と最小（定数項に文字を含む場合）

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