A.sin2的知识精选

等于       (    )A.sin2-cos2      B.cos2-sin2        C.±(...
问题详情:等于       (    )A.sin2-cos2      B.cos2-sin2        C.±(sin2-cos2)  D.sin2+cos2【回答】A知识点:三角函数题型:选择题...
等于                                       (   )A.sin2-co...
问题详情:等于                                       (   )A.sin2-cos2  B.cos2-sin2  C.±(sin2-cos2)D.sin2+cos2【回答】A          知识点:三角函数题型:选择题...
热门标签