1 . 如图,△ABC为等腰三角形,
,
,以A为圆心,1为半径的圆分别交AB,AC与点E,F,点P是劣弧
上的一点,则
的取值范围是______ .
![](https://img.xkw.com/dksih/QBM/2018/1/31/1872448930963456/1873498952097792/STEM/6bdc773b8bea47aba8f7eca30b0571b1.png?resizew=252)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566b100fb2ebe3d208f9b6527934218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e124a392dc84fcc1662fe6d896aa12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e778fcd92a0c8890b5cd7bed0615486.png)
![](https://img.xkw.com/dksih/QBM/2018/1/31/1872448930963456/1873498952097792/STEM/6bdc773b8bea47aba8f7eca30b0571b1.png?resizew=252)
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2018-02-02更新
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4卷引用:安徽省滁州市定远县育才学校2021-2022学年高一下学期期中考试数学试题
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2 . 选修4-4:坐标系与参数方程
在极坐标系中,曲线
,曲线
.以极点为坐标原点,极轴为
轴正半轴建立直角坐标系
,曲线
的参数方程为
(
为参数).
(1)求
的直角坐标方程;
(2)
与
交于不同四点,这四点在
上的排列顺次为
,求
的值.
在极坐标系中,曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6c0f36bc7d4fc026c6e844c129c72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50f1a99e97d8e7bd92f66089b1a0828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2196fb19c69c490bc1d321edecb394ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f6bdcb4eb0cb45306266427287b565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc361b52a2b62eda87eefb457a6b610.png)
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