1 . 已知F为椭圆
的左焦点,直线
与椭圆C交于A,B两点,M为椭圆上的任一点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6438d0e12b0606fa901265403de43df4.png)
______ ;若
轴,垂足为E,BE与椭圆C的另一个交点为P,
的余弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69daca955a565fa537347dd0d93783f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca8b6ac96dfe0046b7ca1745176ca22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6438d0e12b0606fa901265403de43df4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8178c63d125ee6235feeb2fc70d02745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bafaec1cbb31d644a0df6bbd4fe4f0.png)
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2022-11-02更新
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3卷引用:福建省漳州市第八中学2022-2023学年高二上学期期中考试数学试题