Report copyright - 学校法人 天王寺学館 math(b).pdf · 2014. 2. 28. · 5 ABC=DEF Oþ 1 A, B,.c, D, E, F O, ¥61 ABC DEF ADEB, BEFC, CFDA LAOD 20, L AOB 2/3 O < a < — , O < p < sin cosa ABC-DEF
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