圆锥的底面半径为3.,母线与地面所成的角为30度,在圆锥内过顶点作一截面,截面与地面成60度的二面角,求该截面的面积(最好能附上图)
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![圆锥的底面半径为3.,母线与地面所成的角为30度,在圆锥内过顶点作一截面,截面与地面成60度的二面角,求该截面的面积(最好能附上图)](/uploads/image/z/1140359-23-9.jpg?t=%E5%9C%86%E9%94%A5%E7%9A%84%E5%BA%95%E9%9D%A2%E5%8D%8A%E5%BE%84%E4%B8%BA3.%2C%E6%AF%8D%E7%BA%BF%E4%B8%8E%E5%9C%B0%E9%9D%A2%E6%89%80%E6%88%90%E7%9A%84%E8%A7%92%E4%B8%BA30%E5%BA%A6%2C%E5%9C%A8%E5%9C%86%E9%94%A5%E5%86%85%E8%BF%87%E9%A1%B6%E7%82%B9%E4%BD%9C%E4%B8%80%E6%88%AA%E9%9D%A2%2C%E6%88%AA%E9%9D%A2%E4%B8%8E%E5%9C%B0%E9%9D%A2%E6%88%9060%E5%BA%A6%E7%9A%84%E4%BA%8C%E9%9D%A2%E8%A7%92%2C%E6%B1%82%E8%AF%A5%E6%88%AA%E9%9D%A2%E7%9A%84%E9%9D%A2%E7%A7%AF%EF%BC%88%E6%9C%80%E5%A5%BD%E8%83%BD%E9%99%84%E4%B8%8A%E5%9B%BE%EF%BC%89)
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