1 . 参数方程
表示圆心为______ ,半径为______ 的圆,化为标准方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57662a4ccebeb8b8a5ee0cc16ddc4309.png)
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2 . 在直角坐标系
中,曲线
的参数方程为
(
为参数),以坐标原点
为极点,
轴的正半轴为极轴建立极坐标系,直线
的极坐标方程是
.
(1)求曲线
的普通方程和直线
的直角坐标方程;
(2)设直线
与曲线
交于
,
两点,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d56ae53ed70ceb752eecb91a210084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5ac03ca0fa0b07d788ccee0392206b.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设直线
![](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/22840186db0afc0e2b2e8915ce79b998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c1a099b4673fe2ae0f084beae1d0b2.png)
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解题方法
3 . 对于参数方程
,
(1)若r为参数,表示何曲线?
(2)若
为参数且
,表示何曲线?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f1230127e4acf941aad86aaa216338.png)
(1)若r为参数,表示何曲线?
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790fd1b4fe3a98055b08bcb9d332f072.png)
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4 . 直线
与圆
(
为参数)的位置关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/541d6f0fe990980351e7bf05ebdd0c7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ef09d524897bd8ea496d82bd24820e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
A.相交且不过圆心 | B.相交且过圆心 |
C.相切 | D.相离 |
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解题方法
5 . 参数方程
(
为参数)对应的曲线是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6235ccc72a56c145cf18afa78469b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
A.圆 | B.椭圆 | C.直线 | D.线段 |
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解题方法
6 . 参数方程
对应的曲线是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8636214444d4fc7a8d721e06d58a6f8.png)
A.圆 | B.椭圆 | C.双曲线 | D.抛物线 |
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解题方法
7 . 将方程
(
为参数)化为普通方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf67e51e2f142ec3b8ea6ba331310697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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8 .
为参数,圆
的圆心的轨迹方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b475e1a8f1e3873fcfb34be3760c6b.png)
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解题方法
9 . 参数方程
(
为参数,
)对应曲线的长度为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab04217ee37d45f163e8df7b07384a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187ee1ea3b7e47a6283314322e5decf.png)
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解题方法
10 . 在平面直角坐标系中,如果曲线
上任意一点的坐标
都是某个变量
的函数,
,
,并且对于
的每一允许值,由方程组(*)所确定的点
都在曲线
上,那么方程组(*)就叫做曲线
的参数方程,变量
叫做参变量或参变数,简称参数.例如,单位圆
的一个参数方程可以是
,
.已知
,
.
(1)若
,求
的值;
(2)求
与
的关系式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e647c14561826ba9e396acc5a3792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ef198be47a97bd779adb3f8b792833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aadb0dc16644a44c37d9463b8957faf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3fed67b296b0a67d49928dae7e4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02e39caaa7393864f656660d5dce9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a778794e844d82eec2efce68b9c5808.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6712b250bc4218db31853e27b2828b35.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2329774440278b274651ca465704a856.png)
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