题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031224-49119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031225-78263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031225-29124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031225-98429.png)
(Ⅰ)求圆
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031224-49119.png)
(Ⅱ)若圆
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031224-49119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031225-22390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-94940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-52190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-70031.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-96984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-29192.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-70031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031227-18461.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031227-16384.png)
解析
试题分析:(Ⅰ)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031225-78263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031227-46229.png)
(Ⅱ)将圆C的方程化为参数方程将
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-70031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-70031.png)
试题解析:(Ⅰ)由
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031225-78263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031227-56180.png)
所以圆
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031224-49119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-96984.png)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-29192.png)
(Ⅱ)由(Ⅰ)得圆C的参数方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031228-35766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031228-37421.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031228-25423.png)
因此当
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031228-34674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031229-30224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-70031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031227-18461.png)
且当
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031226-70031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031227-16384.png)
核心考点
试题【在极坐标系中,圆的极坐标方程为.现以极点为原点,极轴为轴的非负半轴建立平面直角坐标系.(Ⅰ)求圆的直角坐标方程;(Ⅱ)若圆上的动点的直角坐标为,求的最大值,并写】;主要考察你对常见曲线的极坐标方程等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031220-11544.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031220-25496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031207-59958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031208-56606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031208-26364.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031200-61704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031201-17358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031200-61704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031201-66420.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031146-63146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031146-24903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031146-46693.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-53775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-19461.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-99654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-97075.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-53726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-42039.png)
(Ⅰ)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-53775.png)
(Ⅱ)若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-53775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-53726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031139-90067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108031140-80589.png)
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