1 . 如图,在
中,
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4cb73e9d976cbfe9c590044fa69dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf40643d8abe5b3a14c3d31266cb0aeb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/17/e50388aa-7a94-46c0-abf3-d10825b187f7.png?resizew=212)
您最近一年使用:0次
24-25高一上·全国·课后作业
2 . 在
中,
,
,
,求
的长.(精确到0.001)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bbed94c431ad1868217f49ef862450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6872a53665f39c3cc12d82c7e6d649d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe3aa4fca63c67534568c0da31ce346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
3 . 在
中,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e3fc39d2b508cc1cae769a5e7266c0.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226741a02640e1710d93b2e39ec61440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e3fc39d2b508cc1cae769a5e7266c0.png)
您最近一年使用:0次
4 . 为了测量上海东方明珠塔的高度,某人站在A处测得塔尖的仰角为75.5°,前进38.5m后,到达B处测得塔尖的仰角为80.0°,试计算东方明珠塔的高度.(精确到1m)
您最近一年使用:0次
名校
解题方法
5 . 在
中,
.若
的最长边的长为
.则最短边的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b5cb4cb099c9e1a19c60d7bd0322f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20838e72faf737614d76fcee82ab6c5.png)
A.![]() | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
2024-04-24更新
|
1768次组卷
|
5卷引用:广东省韶关市2024届高三综合测试(二)数学试题
广东省韶关市2024届高三综合测试(二)数学试题山东省泰安市泰山国际学校2023-2024学年高一下学期3月月考数学试题(已下线)6.4.3.2?正弦定理15种常考题型归类(1)-高频考点通关与解题策略(人教A版2019必修第二册)(已下线)6.4.3.2 正弦定理——课后作业(巩固版)广东省佛山市南海区桂城中学2024届高三下学期4月月考数学试题
6 . 在梯形ABCD中,
,
,
,
,
,E,F分别为AD,BC的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a71a9d21f77e9535de152bb33f802bb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
7 . 在
中,
,点
在线段
上,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307a282c4f08779b076cf6489f7aa336.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fbb8bceee477e2942e6364929cf2d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0f8721c5bc8241689e7aab535c2909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307a282c4f08779b076cf6489f7aa336.png)
您最近一年使用:0次
23-24高一下·全国·课后作业
8 . 小明同学为了估算位于哈尔滨的索菲亚教堂的高度,在索菲亚教堂的正东方向找到一座建筑物AB,高为
m,在它们之间的地面上的点M(B,M,D三点共线)处测得楼顶A,教堂顶C的仰角分别是15°和60°,在楼顶A处测得塔顶C的仰角为30°,则小明估算索菲亚教堂的高度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81d17eeb3a9f3aaa60400329e6e61dcb.png)
A.20 m | B.30 m | C.20![]() | D.30![]() |
您最近一年使用:0次
9 . 在△ABC中,
M是BC的中点,
,则AC=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275abf9f53352909d4321a08c51e6d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/251a0e63b401d131f69677ccf5fabacf.png)
A.![]() | B.2 | C.![]() | D.4 |
您最近一年使用:0次