已知曲线
的极坐标方程为
,以极点为平面直角坐标系的原点,极轴为
轴的正半轴,建立平面直角坐标系
.
(1)若曲线
:
(t为参数)与曲线
相交于两点
,
,求
;
(2)若
是曲线
上的动点,且点
的直角坐标为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/094ab3a9f3a40f6fc88a4184371dc745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454d4ca6e3cfaad24362882345e8a449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/3f4dfec890cdfdda355e19463f3be813.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf99adccc80f28343fedd8d0aad7429.png)
更新时间:2020-06-16 23:49:16
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【推荐1】如图所示,有一块扇形钢板
,面积是
平方米,其所在圆的半径为1米.
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(1)求扇形圆心角的大小;
(2)现在钢板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6c71a0da6a878a5b12bf8a8e784645.png)
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【推荐2】已知向量
,
,设函数
.
(1)求函数
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(2)当
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有2个不等实根,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c9546a5fbdf7d9fa27005463519273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fd1042d264328340634e4782f45744.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/955fade76485dacdee5d82108d9c58c3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aea41430d231ef6c95c46b8caa82410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66c231673c5fa1f003431fc537d71327.png)
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【推荐1】某市气象台测得今年第三号台风中心在其正东300 km处,以40 km/h的速度向北偏西
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【推荐2】已知圆
经过点
,且圆心在直线
上,直线
与圆
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的方程;
(2)已知斜率为
的直线
经过原点,求直线
被圆
截得的弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fadc9a19de13ca7688ca93f0c70a8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4407788e4dc88210bca71a2551d4f2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求圆
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(2)已知斜率为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐1】已知曲线
的直角坐标方程为
,以直角坐标系原点
为极点,
轴正半轴为极轴建立极坐标系.
(1)求曲线
的极坐标方程;
(2)设射线
:
,
:
.若
,
分别与曲线
相交于异于原点的两点
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ca010e039d374aa1223acbba49d9fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1f08c7640e62e8717abf4d44a6c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734a6a1d319648bb969845a9159cdba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐2】在直角坐标系
中,直线
的参数方程为
(t为参数).以坐标原点O为极点,x轴的正半轴为极轴建立极坐标系,曲线C的极坐标方程为
.
(1)求直线
的普通方程和曲线C的直角坐标方程;
(2)设点P为曲线C上的动点,点M,N为直线
上的两个动点,若
是以
为直角的等腰三角形,求
直角边长的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72eee7bf0d93301f69d8954bd53c1d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a2a6f848132cc5f3238e729271fd6c.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设点P为曲线C上的动点,点M,N为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec1f8a14b2c1570aa076166017ccf33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec1f8a14b2c1570aa076166017ccf33.png)
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【推荐1】(本小题满分10分)选修4-4:坐标系与参数方程
在直角坐标系
中,以坐标原点为极点,
轴的正半轴为极轴建立极坐标系,曲线
的极坐标方程为
,曲线
的极坐标方程为
.
(1)求曲线
的直角坐标方程和曲线
的参数方程;
(2)设曲线
与曲线
在第二象限的交点为
,曲线
与
轴的交点为
,点
,求
的周长
的最大值.
(本小题满分10分)选修4-5:不等式选讲
已知函数
,
.
(1)当
时,求不等式
的解集;
(2)若函数
的图象与
轴恰好围成一个直角三角形,求
的值.
在直角坐标系
![](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/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa695c5cf64a2e5f80ec118002c74a6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45d1bff285b23d99db3225541823be0.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)设曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c9dcfd9f4c5298035870cb88a34169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a31f9581ab418bf3efde75c8deccfa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(本小题满分10分)选修4-5:不等式选讲
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478c08d3bd602a30e532b765e6b2de3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc895959e9bc92294dc9dd2263dbf0c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cb96300f649bf7eb8207bb7ee95234.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】在直角坐标系xOy中,曲线C1的参数方程为
(
为参数),以坐标原点O为极点,x轴正半轴为极轴建立极坐标系,曲线C2:ρ2﹣4ρcosθ+3=0.
(1)求曲线C1的一般方程和曲线C2的直角坐标方程;
(2)若点P在曲线C1上,点Q曲线C2上,求|PQ|的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a47a1ca7e5aa9bc9dc4b85d967d2fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)求曲线C1的一般方程和曲线C2的直角坐标方程;
(2)若点P在曲线C1上,点Q曲线C2上,求|PQ|的最小值.
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【推荐3】已知曲线C的极坐标方程是
.以极点为平面直角坐标系的原点,极轴为x轴的正半轴,建立平面直角坐标系,直线l的参数方程是
(t为参数),直线l与曲线C相交于A,B两点.
(1)求
的长;
(2)求点
到A,B两点的距离之积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427297bcd1da4ac8cc6174530225cdfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95bb1c2136835df6af14f5112269a42.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4f20bbf89bd5e1b1ee6e366482e76f.png)
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