1 . 在直角坐标系
中,直线
的直角坐标方程为
曲线C的参数方程为
(
为参数),以坐标原点O为极点,
轴正半轴为极轴建立极坐标系.
(1)求直线
和C的极坐标方程;
(2)设直线
与曲线C交于M,N两点,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dd18533a2d1bb0add36fda590c1e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78ceb436344e29456719062049bd24e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2df1bc516cf59796f7610454440afc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084cf5ffced059f5653ee2a1023518b7.png)
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2021-03-21更新
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2卷引用:西藏自治区林芝市第二高级中学2021届高三下学期第一次模拟考试数学(理)试题