1 . 已知向量
,
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e2759b7769f63d56d63e228d749842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7932118be1aeb455f3b06c6e0c447b2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b195aa36a3c2753ebf08cb464c52ad1e.png)
A.![]() | B.1 | C.2 | D.![]() |
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2020高三·全国·专题练习
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2 . 如图,设
,
两点在河的两岸,测量者在
所在的同侧河岸边选定一点
,测出
的距离为50m,
,
后,就可以计算出![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
,
两点间的距离为( )
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8aad200f47027b65a5872c21a5cf3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/f30a85dd-f6e9-4318-8956-e05e67955176.png?resizew=141)
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湖北省黄冈市黄梅国际育才高级中学2018-2019学年高一下学期期中数学试题云南省玉溪第一中学2020-2021学年高一下学期期中考试数学试题甘肃省兰州市教育局第四片区2022-2023学年高一下学期联片办学期中考试数学试题(已下线)考点25 正弦定理、余弦定理的应用(考点专练)-备战2021年新高考数学一轮复习考点微专题(已下线)对点练34 正余弦定理应用-2020-2021年新高考高中数学一轮复习对点练广西贵港市覃塘区覃塘高级中学2020-2021学年高一3月月考数学试题人教A版(2019) 必修第二册 实战演练 第六章 课时练习14余弦定理、正弦定理应用举例安徽省滁州市定远县育才学校2021-2022学年高一下学期第二次月考数学试题安徽省滁州市定远县民族中学2021-2022学年高一下学期3月月考数学试题山西省运城市景胜中学2022-2023学年高一下学期3月月考数学试题(B卷)北京名校2023届高三一轮总复习 第3章 三角函数 3.8 解三角形(2)(已下线)6.4.3 第3课时 余弦定理、正弦定理应用举例【第一课】“上好三节课,做好三套题“高中数学素养晋级之路(已下线)FHsx1225yl186
3 . 如图,江岸边有一观察台CD高出江面30米,江中有两条船A和B,由观察台顶部C测得两船的俯角分别是
和
,若两船与观察台底部连线成
角,则两船的距离是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516935070220288/2518310524002304/STEM/f38d44c5e84347958e1519a4afbf67f2.png?resizew=126)
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4 . 如图,在
中,
,点
在边
上,且
,则
等于( )
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516935070220288/2518310523863040/STEM/e79bc686568c4e5e9514523e75155a68.png?resizew=248)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6f76d991bc7b6345676f04a5b66f70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a50d3b893c9eb00791c230f99c5721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516935070220288/2518310523863040/STEM/e79bc686568c4e5e9514523e75155a68.png?resizew=248)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 .
中,内角
所对的边分别为
.若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa74bd5d9ce9da5ebfdba04d2b880d2.png)
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa74bd5d9ce9da5ebfdba04d2b880d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38f550e95b2950f91e8ec1798b94109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.6 | B.![]() | C.![]() | D.![]() |
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7卷引用:湖北省黄冈市黄梅县国际育才高级中学2019-2020学年高一下学期期中数学试题
解题方法
6 . 已知点
为单位圆上任意一点,若点
在单位圆上绕原点顺时针旋转
到点
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fb1a589404b101361fab4a264af920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fb1a589404b101361fab4a264af920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4adb1a0c5fbcaa7cb61b2febdb7db3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19272840c71b888aa46feb96b5e3bb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
7 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e5710ddab574967b277cc5463743843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1f1b2e7133eda905f44d6654ef80af.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 已知
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b4cab645c97f6d1710f803ef6a8436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdd2619994f0dec8dbe95faa8d446489.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 锐角
的内角
,
,
的对边分别为
,
,
.
(1)若
,求角
的大小;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ece733f5cf3276f82a4092062a6fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8904522bf844b61febddc24346f8232f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ea513ef4c8fc4d8c31eff498740680.png)
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10 . 化简求值:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4044078ed7d06acae1c39c9c1647da5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbbb5a1dc37a4b3570353729288011b.png)
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|
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