题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023139-90316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023139-74170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023139-84658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023140-46754.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023140-17075.png)
解析
试题分析:因为在极坐标系中,定点
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023139-90316.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023140-61301.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023140-10120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023139-74170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023140-38378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023140-46754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023141-25581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023140-38378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023141-54173.png)
点评:要抓住极坐标与直角坐标互化公式这个关键点,把极坐标问题转化为直角坐标问题解决.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023130-47763.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023121-45248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023121-98452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023122-36870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023122-19303.png)
(1)以原点O为极点,以x轴的正半轴为极轴建立极坐标系,求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023122-24982.png)
(2)经过点
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023122-51264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023122-24982.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023123-65255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023123-36015.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023123-65360.png)
已知极坐标的极点在平面直角坐标系的原点
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023114-73594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023114-24089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023115-15724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023115-10846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023115-55868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023115-25225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023116-66957.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023115-15724.png)
(2)若点
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023116-62292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023115-15724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023116-62292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023115-25225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108023109-71734.png)
A.圆,圆 | B.圆,直线 | C.直线,直线 | D.直线,圆 |
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