倾斜角为
且在x轴上的截距为a的直线被圆
所截得的弦长为2,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7277696e8d9f58c9ec28887783b317e8.png)
___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65af1d6b6b831ebbdc36dda5f304a3a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0512263e955c306701f4ed59904b02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7277696e8d9f58c9ec28887783b317e8.png)
更新时间:2019-02-17 23:48:32
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【知识点】 圆的弦长与中点弦
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填空题-单空题
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较易
(0.85)
解题方法
【推荐1】已知直线
与圆
交于A,B两点,则当
取得最小值时,其余弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3e2ed541ba137882dfc7175802e2d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f03107eba48bb6a22b28ad305a4a41d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
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填空题-单空题
|
较易
(0.85)
【推荐2】在极坐标系中,直线
与圆
交于
两点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061cd50e1746a9e15bee7a9974616f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdebedd02b4ea57f8562443742086d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
您最近一年使用:0次