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解题方法
1 . 一艘船以每小时
的速度向东行驶,船在
处看到一灯塔
在北偏东
,行驶
小时后,船到达
处,看到这个灯塔在北偏东
,这时船与灯塔的距离为_______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb87509897b74d485527e9aa8af3f29.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/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c12e76fbd84eeec721386bd3b04cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce89b633e5d6bcf9406e3f9208fe06d.png)
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2 . 在平面直角坐标系
中,先将线段OP绕原点O按逆时针方向旋转角
再将OP的长度伸长为原来的
倍,得到
我们把这个过程称为对点P进行一次T,
变换得到点
例如对点P
进行一次
变换,得到点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150901b786f6646d2db9be33a7aed4d3.png)
(1)试求对点
进行一次
变换后得到点
的坐标;
(2)已知对点
进行一次
换后得到点
求对点
再进行一次
变换后得到点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7038a3e4975c5200d16803885eef7b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/352bee5fea6e0f11fffe7decf7ab35c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b87bf7395e0648e156644b8b639644e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a850932927deee38a046bfc236bb35be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5acee354aaa76e0990087cc075172a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7ccf6ada817b9d57fe30a79bacaf23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4acfac1b712c66bba5e73c98fd4b1ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150901b786f6646d2db9be33a7aed4d3.png)
(1)试求对点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea191cdc92920c76fe66702d99130fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/616f909e7723fb33b091450010622b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
(2)已知对点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3ff60547c603c3a3f6e76755723e1b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1f08f7da3bea90babef0b0e67e7dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6592325d4f66a073a31d8dde0e1a5ed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1f08f7da3bea90babef0b0e67e7dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
您最近一年使用:0次
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3 . 在
中,若
,则角
的大小为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/590e08729470930e74df5018cdd59e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-08-23更新
|
2558次组卷
|
5卷引用:上海市曹杨二中2018-2019学年高一下期末数学试题
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