正方形
的边长为1,点
在边
上,点
在边
上,
.动点
从
出发沿直线向
运动,每当碰到正方形的边时反弹,反弹时反射角等于入射角,当点
第一次碰到
时,
与正方形的边碰撞的次数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3cae9575876feee88251a52922be939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.4 | B.3 | C.8 | D.6 |
18-19高三下·北京·阶段练习 查看更多[2]
更新时间:2019-04-19 21:27:24
|
【知识点】 三角函数在生活中的应用解读
相似题推荐
单选题
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较难
(0.4)
真题
【推荐1】如图,某人在垂直于水平地面
的墙面前的点
处进行射击训练,已知点
到墙面的距离为
,某目标点
沿墙面上的射线
移动,此人为了准确瞄准目标点
,需计算由点
观察点
的仰角
的大小(仰角
为直线
与平面
所成的角),若
,
,
,则
的最大值是
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/684ae70b-4829-45f5-9d2f-0c25950efb14.png?resizew=158)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/ddb42c200b01420896071c414174c120.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/7841b8c5699b4abea77f54b22bb2f04f.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/7841b8c5699b4abea77f54b22bb2f04f.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/417bfad46a4a46c19896e8b74d1e3b3d.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/0b2110931f36430ca044c06e7612eca2.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/02d7e63e3a6a42abaa0615ad23ecf93d.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/0b2110931f36430ca044c06e7612eca2.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/7841b8c5699b4abea77f54b22bb2f04f.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/0b2110931f36430ca044c06e7612eca2.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/b5cdf9c5c467479e9263eaa0760acea6.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/cc3249a9aff945f6b875953fe03325bf.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/c44479f5600a4298a9257e9bb3a6a2ea.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/ddb42c200b01420896071c414174c120.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/861f1753247f422591b6b330ad7706d6.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/a2b5cc06c7cb4f5ebf8b2ca3fc22eff6.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/f08eed51c43846c882ad32089f41b713.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571786814783488/1571786820378624/STEM/57585e1f2e7a4dd0b9f82f7d722047b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/684ae70b-4829-45f5-9d2f-0c25950efb14.png?resizew=158)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
【推荐2】有一直角转弯的走廊(两侧与顶部都封闭),已知走廊的宽度与高度都是3米,现有不能弯折的硬管需要通过走廊,设不计硬管粗细可通过的最大极限长度为l米.为了方便搬运,规定允许通过此走廊的硬管的最大实际长度为
米,则m的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5854831aa2d01f84383abb6d185aacc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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