名校
解题方法
1 . 在直角坐标系
中,以原点
为极点,
轴正半轴为极轴建立极坐标系,已知曲线
的极坐标方程为
,曲线
的参数方程为
(
为参数).若曲线
与
相交于
两点,则线段
的长等于__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0b6ef6ace9cc38df67d6cfa7cfb3a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c878f22864c8bacafe3b802b243bb2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2 . 已知在平面直角坐标系xOy中,圆C的参数方程为:
(为参数),以Ox为极轴建立极坐标系,直线l的极坐标方程为:
,则圆C截直线l所得弦长为__________ .
![](https://img.xkw.com/dksih/QBM/2015/5/4/1572094472478720/1572094477754368/STEM/55d403ce97e7444f9a130a353a74df5f.png?resizew=105)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14303cbd128cd9d3b8e0426a377ccdaa.png)
您最近一年使用:0次
3 . 在平面直角坐标系中,以原点为极点,
轴的非负半轴为极轴建立极坐标系.已知曲线
:
与直线
:
(
为参数)相交于
两点,则
= .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d44ff73d1c293d3461442dd1b5359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/908953543987af69bade1afe69e9c496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a79c8cda9992ab8a941e9303619de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
您最近一年使用:0次