在平面直角坐标系中,己知O为坐标原点,点A(3,0),B(0.4),以点A为旋转中心,把△ABO顺时针旋转,得△ACD.记旋转角为α.∠ABO为β.(I )如图①,当旋转后点D恰好落在AB边上时,求点D的坐标;(
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![在平面直角坐标系中,己知O为坐标原点,点A(3,0),B(0.4),以点A为旋转中心,把△ABO顺时针旋转,得△ACD.记旋转角为α.∠ABO为β.(I )如图①,当旋转后点D恰好落在AB边上时,求点D的坐标;(](/uploads/image/z/5228513-17-3.jpg?t=%E5%9C%A8%E5%B9%B3%E9%9D%A2%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%2C%E5%B7%B1%E7%9F%A5O%E4%B8%BA%E5%9D%90%E6%A0%87%E5%8E%9F%E7%82%B9%2C%E7%82%B9A%EF%BC%883%2C0%EF%BC%89%2CB%EF%BC%880.4%EF%BC%89%2C%E4%BB%A5%E7%82%B9A%E4%B8%BA%E6%97%8B%E8%BD%AC%E4%B8%AD%E5%BF%83%2C%E6%8A%8A%E2%96%B3ABO%E9%A1%BA%E6%97%B6%E9%92%88%E6%97%8B%E8%BD%AC%2C%E5%BE%97%E2%96%B3ACD%EF%BC%8E%E8%AE%B0%E6%97%8B%E8%BD%AC%E8%A7%92%E4%B8%BA%CE%B1%EF%BC%8E%E2%88%A0ABO%E4%B8%BA%CE%B2%EF%BC%8E%EF%BC%88I+%EF%BC%89%E5%A6%82%E5%9B%BE%E2%91%A0%2C%E5%BD%93%E6%97%8B%E8%BD%AC%E5%90%8E%E7%82%B9D%E6%81%B0%E5%A5%BD%E8%90%BD%E5%9C%A8AB%E8%BE%B9%E4%B8%8A%E6%97%B6%2C%E6%B1%82%E7%82%B9D%E7%9A%84%E5%9D%90%E6%A0%87%EF%BC%9B%EF%BC%88)
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