1 . 选修4-4: 坐标系与参数方程
在直角坐标系
中,直线
经过点
,其倾斜角为
,以原点
为极点,以
轴非负半轴为极轴,与直角坐标系
取相同的长度单位,建立极坐标系,设曲线
的极坐标方程为
.
(Ⅰ)写出直线
的参数方程,若直线
与曲线
有公共点,求
的取值范围;
(Ⅱ)设
为曲线
上任意一点,求
的取值范围.
在直角坐标系
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/d8d4358f04964fc58d1bbe102fc77463.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/335de97022a74fc49f6aa56d5127015c.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/3386ae0e9c704ec7bc2c94b03c6b4456.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/2e190fbd99cc4025b83db3b1623860fd.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/e6ab23ed247447fe92dce05a7de6c0ef.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/467794cb876d4150bf13fa8a19bf9270.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/d8d4358f04964fc58d1bbe102fc77463.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/2d3e271f096d45c69b952c059d387a3c.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/2f9c65549a1a4f88843297cb33b140f8.png)
(Ⅰ)写出直线
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/335de97022a74fc49f6aa56d5127015c.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/335de97022a74fc49f6aa56d5127015c.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/2d3e271f096d45c69b952c059d387a3c.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/2e190fbd99cc4025b83db3b1623860fd.png)
(Ⅱ)设
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/f4b19e6241ae4793832f61014cf46242.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/2d3e271f096d45c69b952c059d387a3c.png)
![](https://img.xkw.com/dksih/QBM/2016/7/6/1572895900696576/1572895906349056/STEM/348b4e866f814511a924360110a8099e.png)
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2016-12-04更新
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2卷引用:2015-2016学年辽宁葫芦岛一中等校高二6月联考理数学卷