1 . “大美中国古建筑名塔”榴花塔以红石为基,用青砖灰沙砌筑建成.如图,记榴花塔高为
,测量小组选取与塔底
在同一水平面内的两个测量点
和
,现测得
,
,
,在点
处测得塔顶
的仰角为30°,则塔高
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be99fa94a1f3e4964fcc13a14fab9ba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549e0751ead33108123edf38e3833e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eb421e212e40c8dc1087dd159e30b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb5ee9fec57d831ca6ac36dae82a62e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be99fa94a1f3e4964fcc13a14fab9ba5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8卷引用:广东省东莞市2020-2021学年高一下学期期末数学试题
名校
2 . 如图所示,为了测量A,B两处岛屿间的距离,小明在D处观测,A,B分别在D处的北偏西
、北偏东
方向,再往正东方向行驶20海里至C处,观测B在C处的正北方向,A在C处的北偏西
方向,则A,B两处岛屿间的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/69027c5f-b0ce-4b3d-a7d1-f0999ef7e2a7.png?resizew=201)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dff6409238534718b88a2055d9385fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe8140a38ee6b0b28a5b661f8b1f3d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe8dc472dade6cea6943164792ab532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/69027c5f-b0ce-4b3d-a7d1-f0999ef7e2a7.png?resizew=201)
A.![]() | B.![]() |
C.![]() | D.20海里 |
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2019-02-18更新
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966次组卷
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2卷引用:【市级联考】广东省东莞市2017-2018学年高二第一学期期末考试数学理科试题
11-12高二上·广东东莞·期末
3 . 甲船在
处观察到乙船在它北偏东
的方向,两船相距
海里,乙船正在向北行驶,若甲船的速度是乙船的
倍,则甲船应取北偏东
方向前进,才能尽快追上乙船,此时![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
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2017-10-16更新
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5卷引用:2011年广东省东莞市教育局教研室高二上学期数学理卷A
(已下线)2011年广东省东莞市教育局教研室高二上学期数学理卷A2014-2015学年宁夏银川唐徕回民中学高一下学期期末考试数学试卷山东省枣庄市第八中学南校区高二10月份月考数学试题湖南省常德市石门县第二中学2019-2020学年高二上学期第一次月考数学试题(已下线)【新教材精创】9.2正弦定理与余弦定理的应用(第1课时)练习(1)