选修4-4:坐标系与参数方程
直线
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(极轴与x轴的非负半轴重合,且单位长度相同).
(1)求圆心C到直线l的距离;
(2)若直线l被圆C截的弦长为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180207371895911/SYS201310241802073718959022_ST/1.png)
的值.
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024180207371895911/SYS201310241802073718959017_ST/0.png)
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