以直角坐标系的原点
为极点,
轴的正半轴为极轴,并在两种坐标系中取相同的长度单位,点
的极坐标为
,圆
以
为圆心,4为半径;又直线
的极坐标方程为
.
(1)求直线
和圆
的普通方程;
(2)试判定直线
和圆
的位置关系.若相交,则求直线
被圆
截得的弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e23e5aecdafb2c369f2cb7e55bee10a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbe3e04c4168986a6c97301f0a439af.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)试判定直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
更新时间:2017-07-16 20:51:49
|
相似题推荐
【推荐1】已知
的顶点坐标分别是
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,
.
(1)求
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(2)已知直线
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【推荐2】已知圆C:
内有一点P(2,2),过点P作直线l交圆C于A、B两点.
(1)当l经过圆心C时,求直线l的方程;
(2)当直线l的倾斜角为45º时,求弦AB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02a420d06091c0fb4b43beffe322c16.png)
(1)当l经过圆心C时,求直线l的方程;
(2)当直线l的倾斜角为45º时,求弦AB的长.
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【推荐1】极坐标系的极点为直角坐标系
的原点,极轴为
轴的非负半轴,两种坐标系中的长度单位相同;已知曲线
的极坐标方程为
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过点
,且直线
的参数方程为
(
为参数).
(1)求
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(2)直线
与曲线
交于
、
两点,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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(1)求
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(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e255cb6ef5a18b9e800397c55a81bf9.png)
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解题方法
【推荐2】在直角坐标系xOy中,曲线
的参数方程为
,(
为参数),曲线
的方程为
.以O为极点,x轴非负半轴为极轴建立极坐标系.
(1)求曲线
的极坐标方程;
(2)已知射线
与曲线
交于O,A两点,将射线
绕极点逆时针方向旋转
得到射线
,射线
与曲线
交于O,B两点.当
的面积最大时,求
的值,并求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abd09af119941fa000c5dd85d6f2e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28c8bdaa5a80c2dbd54c37af456064e3.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)已知射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea1e24211b222d3e26b23d61d93c8de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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【推荐3】选修4-4:坐标系与参数方程
在平面直角坐标系
中,曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a259dddccc3cfe8f81735cd5834785d.png)
(
是参数).在以
为极点,
轴的正半轴为极轴的极坐标系中,曲线
:
.点
是曲线
上的动点.
(1)求点
到曲线
的距离的最大值;
(2)若曲线
:
交曲线
于
两点,求
的面积.
在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a259dddccc3cfe8f81735cd5834785d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)若曲线
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