有關A.sin2的精選大全

等於       (    )A.sin2-cos2      B.cos2-sin2        C.±(...
問題詳情:等於       (    )A.sin2-cos2      B.cos2-sin2        C.±(sin2-cos2)  D.sin2+cos2【回答】A知識點:三角函數題型:選擇題...
等於                                       (   )A.sin2-co...
問題詳情:等於                                       (   )A.sin2-cos2  B.cos2-sin2  C.±(sin2-cos2)D.sin2+cos2【回答】A          知識點:三角函數題型:選擇題...
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