用三角函数定义巧解“OA^→⊥OB^→”的解析几何问题

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1005-9741|volume|6|5-8

ISSN: 1005-9741

Source: 河北理科教学研究, Vol.volume, Iss.6, 2015-01, pp. : 5-8

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Abstract