1 . 筒车是我国古代发明的一种水利灌溉工具,因其经济又环保,至今还在农业生产中得到应用,明朝科学家徐光启在
农政全书
中用图画描绘了筒车的工作原理
假定在水流稳定的情况下,筒车上的每一个盛水筒都做匀速圆周运动
如图,将筒车抽象为一个几何图形
圆
,筒车的半径为
,筒车转轮的中心
到水面的距离为
,筒车每
秒沿逆时针方向转动
圈
规定:盛水筒
对应的点
从水中浮现
即
时的位置
时开始计算时间.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/9a7b9f13-f455-4160-8f56-9897de0954f6.png?resizew=152)
(1)以过点
的水平直线为
轴,过点
且与水面垂直的直线为
轴,建立如图所示的平面直角坐标系,试将点
距离水面的高度
单位:米
表示为时间
单位:秒
的函数;
(2)在水轮转动的任意一圈内,有多长时间点
距水面的高度超过
米?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b0e787c1d82071c825975348698f58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/461950348087cdb06ec28d7569d14c1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71a41641aa0d0e45a3c03d3d2c1196b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f328ba89c0a92a4447788b65571f7aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/4/9a7b9f13-f455-4160-8f56-9897de0954f6.png?resizew=152)
(1)以过点
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2029738f3fb7fd9811bb80145098ba6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1fa34438b5f4ab8a2d5bfa405984be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
(2)在水轮转动的任意一圈内,有多长时间点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
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2 . 已知角
的终边上一点
,
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b5814cbea98f04a0aa3f0cb2d93796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe2c44e7b90a509b2a6ee41c4be7ae6.png)
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3 . 已知点
是角
终边上一点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c54049d4474dd3de2a5a2799f7f8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5acb85cce3c0e8690fb31a0fd8b53a5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 已知角
的终边与单位圆的交点为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fdb0a3feec3e38d2b65545a7e30157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b874f380a7a09bd60937209532a2df1f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:新疆乌鲁木齐市第八中学2022-2023学年高一上学期期末考试数学试题
5 . 已知角α的终边上有一点
,则cosα=_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ce9b66b23e161690e18bbd0c556258.png)
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6 . (1)已知一扇形的圆心角是
,所在圆的半径是R.若
,
cm,求扇形的弧长与该弧所在的弓形面积;
(2)若角
的终边与函数
的图象重合,求
、
和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d02d80d4e2f6f984036bd22a1a2077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2c04cf1526b75a516ef1a578bdd4c0f.png)
(2)若角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f9dd931fc16e24f2e818f327dc1d05e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
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7 . 如图,在平面直角坐标系
中,第二象限角
的终边与单位圆交于点A,且点A的纵坐标为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d36429990cc317010d33c0e8f86233a.png)
的值;
(2)先化简再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e514bc1761deff47d27c1909c1906ab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d36429990cc317010d33c0e8f86233a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d181b9371c5543bdb1df2b0d6eefb7fe.png)
(2)先化简再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5bb9161ec6defdb0ba9e4b0bfb855c.png)
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8 . 下列说法正确的是( )
A.若![]() ![]() ![]() |
B.若![]() ![]() |
C.对![]() ![]() |
D.若![]() ![]() ![]() |
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解题方法
9 . (1)已知角
的终边经过点
,求
的值;
(2)已知角
终边上一点P与x轴的距离与y轴的距离之比为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c798c77d412bf82b4ab8d25aa6f351e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b96b04d1470168128352620258a28a.png)
(2)已知角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60fe5130254a1d38bb4fd0015630f6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b96b04d1470168128352620258a28a.png)
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6卷引用:江苏省南京市第三高级中学2022-2023学年高一上学期期末复习达标检测数学试题
江苏省南京市第三高级中学2022-2023学年高一上学期期末复习达标检测数学试题第五章 三角函数单元检测(已下线)专题19三角函数的概念-【倍速学习法】(人教A版2019必修第一册)(已下线)每日一题 第20题 三角求值 定义处理(已下线)7.2.1 三角函数的定义-【帮课堂】(人教B版2019必修第三册)(已下线)模块一 B提升卷 专题2任意角的三角函数【人教B版】
名校
解题方法
10 . 平面直角坐标系中,已知点
在单位圆上且位于第三象限,点
的纵坐标为
,现将点
沿单位圆按顺时针方向运动到点
,所经过的弧长为
,则点
的纵坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.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/d49f8a63ddbca52039fa9ab44cda6b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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