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1 . 如图所示,一半径为4米的水轮,水轮圆心
距离水面2米,已知水轮每60秒逆时针转动一圈,如果当水轮上点
从水中浮现时(图中点
)开始计时,则( ).
![](https://img.xkw.com/dksih/QBM/2021/5/18/2723802947461120/2760753324343296/STEM/81ca17f1-2efd-435e-9aa1-5ff1d233735e.png?resizew=210)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://img.xkw.com/dksih/QBM/2021/5/18/2723802947461120/2760753324343296/STEM/81ca17f1-2efd-435e-9aa1-5ff1d233735e.png?resizew=210)
A.点![]() |
B.当水轮转动155秒时,点![]() |
C.当水轮转动50秒时,点![]() |
D.点![]() ![]() ![]() ![]() |
您最近一年使用:0次
2021-07-09更新
|
1281次组卷
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8卷引用:福建省三明第一中学2024届高三上学期10月月考数学试题
福建省三明第一中学2024届高三上学期10月月考数学试题福建省2021届高三高考考前适应性练习卷(二)数学试题(已下线)考点08 三角函数与解三角形-备战2022年高考数学学霸纠错(新高考专用)(已下线)专题08 三角函数与解三角形-备战2022年高考数学母题题源解密(新高考版)(已下线)突破5.7 三角函数的应用(课时训练)-【新教材优创】突破满分数学之2022-2023学年高一数学重难点突破+课时训练 (人教A版2019必修第一册)(已下线)2023年四省联考变试题11-165.5三角函数模型的简单应用(已下线)7.4 三角函数的应用-同步精品课堂(苏教版2019必修第一册)
解题方法
2 . 随着市民健康意识的提升,越来越多的人走出家门健身,身边的健身步道成了市民首选的运动场所.如图,某公园内有一个以
为圆心,半径为
,圆心角为
的扇形人工湖
,
、
是分别由
、
延伸而成的两条健身步道.为进一步完善全民健身公共服务体系,主管部门准备在公园内增建三条健身步道,其中一条与
相切于点
,且与
、
分别相交于
、
,另两条是分别和湖岸
、
垂直的
、
(垂足均不与
重合).在
区域以内,扇形人工湖
以外的空地铺上草坪,则( )
![](https://img.xkw.com/dksih/QBM/2021/2/3/2650207175548928/2652168209588224/STEM/99f0bff2-56e7-4149-9870-0e75a9ee3d88.png?resizew=293)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://img.xkw.com/dksih/QBM/2021/2/3/2650207175548928/2652168209588224/STEM/99f0bff2-56e7-4149-9870-0e75a9ee3d88.png?resizew=293)
A.![]() ![]() |
B.新增步道![]() ![]() |
C.新增步道![]() ![]() ![]() |
D.当点![]() ![]() ![]() |
您最近一年使用:0次