1 . 如图,已知两座山的海拔高度
米,
米,在BC同一水平面上选一点
,测得
点的仰角为
点的仰角为
,以及
,则M,N间的距离为____________ 米.(结果保留整数,参考数据
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9cbea10075834324a661a4514c4e02.png)
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2 . 某地需要经过一座山两侧的
两点修建一条穿山隧道.工程人员先选取直线
上的三点
,在隧道
正上方的山顶
处测得
处的俯角为
,
处的俯角为
,
处的俯角为
,且测得
,
,
,则拟修建的隧道
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
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3 . 《海岛算经》是魏晋时期数学家刘徽所著的测量学著作,书中有一道测量山上松树高度的题目,受此题启发,小李同学打算用学到的解三角形知识测量某建筑物上面一座信号塔的高度.把塔底与塔顶分别看作点C,D,CD与地面垂直,小李先在地面上选取点A,B,测得
,在点A处测得点C,D的仰角分别为
,
,在点B处测得点D的仰角为
,则塔高CD为______ m.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc4614e473e1a153bd142f031eef4764.png)
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4 . 为保障高考的公平性,高考时每个考点都要安装手机屏蔽仪,要求在考点周围1km处不能收到手机信号,检查员抽查某区一考点,在考点正西
km有一条北偏东
方向的公路,在此处检查员用手机接通电话,如果以每小时12km的速度沿公路行驶,则最长需要______ 分钟检查员开始收不到信号.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
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5 . 某货轮在
处看灯塔
在货轮北偏东
方向上,距离为
n mile;在
处看灯塔
在货轮的北偏西
方向上,距离
.货轮由
处向正北航行到
处时,再看灯塔
在南偏东
方向上,
处与
处之间的距离是__________ n mile,灯塔
与
处之间的距离是 __________ n mile.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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6 . 如图,要计算西湖岸边两景点B与C的距离,由于地形的限制,需要在岸上选取A和D两点,现测得AD⊥CD,AD=10 km,AB=14 km,
,
,则两景点B与C的距离为________ km(精确到0.1 km,参考数据:
,
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4f8fe909fd18216cc2fe13fd260162f.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/20/45850180-628a-411b-a884-81f69a5243a9.png?resizew=153)
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2024高一下·全国·专题练习
名校
7 .
两地之间隔着一个山冈,如图,现选择另一点
,测得
,
,则
两点之间的距离为________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1a7619897ea667abd98dd52ca867d44.png)
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8 . 海边近似平直的海岸线上有两处码头
、
,且
.现有一观光艇由
出发,同时在
处有一小艇出发向观光艇补充物资,其速度为观光艇的两倍,在
处成功拦截观光艇,完成补给.若两船都做匀速直线运动,观光艇行驶向海洋的方向任意的情况下,小艇总可以设定合适的出发角度,使得行驶距离最小,则拦截点
距离海岸线的最远距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2024高一下·全国·专题练习
名校
解题方法
9 . 圭表是我国古代一种通过测量正午日影长度来推定节气的天文仪器,它包括一根呈南北方向的水平长尺(称为“圭”)和一根直立于圭面的标杆(称为“表”),如图.成语有云:“立竿见影”,《周髀算经》里记载的二十四节气就是通过圭表测量日影长度来确定的.利用圭表测得某市在每年夏至日的早上8:00和中午13:00的太阳高度角分别为
(
)和
(
).设表高
为1米,则影差![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf7b5976aa8c8651ca066234db55088.png)
_____________ 米(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2690e1a00ef032f0d6a0082e4eee46b1.png)
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2024-03-06更新
|
496次组卷
|
9卷引用:6.4.3 第2课时 正弦定理【第二练】“上好三节课,做好三套题“高中数学素养晋级之路
(已下线)6.4.3 第2课时 正弦定理【第二练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)6.4.3余弦定理、正弦定理(第4课时)(已下线)6.4.3 第3课时 余弦定理、正弦定理应用举例【第二练】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)专题3 最佳视角 米勒定理【练】(已下线)高一数学第一次月考模拟卷(范围:平面向量+复数)-同步精讲精练宝典(已下线)高一下学期第一次月考模拟卷(新题型)-同步题型分类归纳讲与练(人教A版2019必修第二册)(已下线)专题11.3余弦定理、正弦定理的应用-重难点突破及混淆易错规避(苏教版2019必修第二册)(已下线)第四章三角恒等变换章末综合检测卷(新题型)-【帮课堂】(北师大版2019必修第二册)山东省菏泽市第一中学八一路校区2023-2024学年高一下学期3月月考数学试题
10 . 已知灯塔A在海洋观测站C的北偏东40°的方向上,A,C两点间的距离为5海里.某时刻货船B在海洋观测站C的南偏东80°的方向上,此时B,C两点间的距离为8海里,该时刻货船B与灯塔A间的距离为______ 海里.
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