名校
1 . 在
中,
,三角形面积
满足
,则
与
的夹角的范围________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea86a14b9f3584ffe2fca31be08d28e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a23505eb612060c9518e882fcb5c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
您最近一年使用:0次
2020-02-29更新
|
279次组卷
|
2卷引用:上海市宝山区宝山中学2017-2018学年高二上学期期中数学试题
名校
解题方法
2 . 在
中,角
、
、
的对边分别是
、
、
,若
,
,
,则边
的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1dffdebbc8f10cbf0dc0affbcbe9f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
3 . 如图所示,为了测量某湖泊两侧
、
之间的距离,李宁同学首先选定了与
、
不共线的一点
,然后给出了三种测量方案(已知角
、
、
所对边分别记作
、
、
);①测量
、
、
;②测量
、
、
;③测量
、
、
.则一定能确定
、
距离的方案个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/e369a781-1ed6-496c-9836-85cb98f579ca.png?resizew=147)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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)
![](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/2c94bb12cee76221e13f9ef955b0aab1.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/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/5963abe8f421bd99a2aaa94831a951e9.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/2022/12/15/e369a781-1ed6-496c-9836-85cb98f579ca.png?resizew=147)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 在
中,边
,
,则角
的取值范围是________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2020-02-10更新
|
250次组卷
|
4卷引用:2016届上海市徐汇区高三上学期期末学习能力诊断(文)数学试题
2016届上海市徐汇区高三上学期期末学习能力诊断(文)数学试题2016届上海市徐汇区高考一模(文科)数学试题(已下线)专题09+正弦、余弦定理和解斜三角形-2020-2021学年新教材高一数学寒假辅导讲义(沪教版2020)上海市新川中学2022-2023学年高一下学期第一次月考数学试题
名校
解题方法
5 . 已知
是锐角
的外心,
.若
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da34ca79dff70e12ee89de5a28673b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/444f456a004081fe1c8a81e9e2275f92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
您最近一年使用:0次
2020-02-09更新
|
707次组卷
|
5卷引用:2016届上海市徐汇区高考一模(理科)数学试题
2016届上海市徐汇区高考一模(理科)数学试题(已下线)第13讲 向量的应用(讲义)-【教育机构专用】2021年春季高一数学辅导讲义(沪教版2020必修第二册)上海交通大学附属中学2021-2022学年高一下学期4月月考数学试题(已下线)专题02 平面向量-2021年高考数学二轮复习解题技巧汇总(新高考地区专用)(已下线)专题13 平面向量(模拟练)-1
解题方法
6 . 若边长为6的等边三角形
,
是其外接圆上任一点,则
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3243634505945341e0f9f769e9869fc8.png)
您最近一年使用:0次
2020-02-07更新
|
214次组卷
|
2卷引用:上海市理工附中等七校2016届高三下学期3月联考(文)数学试题
15-16高三上·上海浦东新·期中
名校
7 .
中,
分别是角
的对边,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fadd2e6f0aa16c2c466c904474ffc79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e29b822cda1ba926e96368094fa1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
您最近一年使用:0次
8 . 在
中,
、
、
所对的边分别为
、
、
,若
、
、
成等差数列,
,且
的面积为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
___ .(用数值作答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.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)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905f306dc08525842a96cfcab32c1ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
您最近一年使用:0次
2020-02-04更新
|
169次组卷
|
2卷引用:2016届上海市静安区高考一模(文科)数学试题
9 . 如图所示,
、
是两个垃圾中转站,
在
的正东方向
千米处,
的南面为居民生活区.为了妥善处理生活垃圾,政府决定在
的北面建一个垃圾发电厂
.垃圾发电厂
的选址拟满足以下两个要求(
、
、
可看成三个点):①垃圾发电厂到两个垃圾中转站的距离与它们每天集中的生活垃圾量成反比,比例系数相同;②垃圾发电厂应尽量远离居民区(这里参考的指标是点
到直线
的距离要尽可能大).现估测得
、
两个中转站每天集中的生活垃圾量分别约为
吨和
吨.设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/ea58d1c4-44a1-48af-be8b-c62e6b7724cd.png?resizew=189)
(1)求
(用
的表达式表示);
(2)垃圾发电厂该如何选址才能同时满足上述要求?
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6f1af4b44b2e97e8f319bab4ae9010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef294de00af64881af2fffe471582f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/ea58d1c4-44a1-48af-be8b-c62e6b7724cd.png?resizew=189)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c45085c7cb291380fd6611390e4bf28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)垃圾发电厂该如何选址才能同时满足上述要求?
您最近一年使用:0次
2020-02-03更新
|
332次组卷
|
5卷引用:2016届上海市奉贤区高三4月调研测试(二模)(文)数学试题
10 . 如图,一智能扫地机器人在A处发现位于它正西方向的B处和北偏东
方向上的C处分别有需要清扫的垃圾,红外线感应测量发现机器人到B的距离比到C的距离少0.4m,于是选择沿
路线清扫.已知智能扫地机器人的直线行走速度为0.2m/s,忽略机器人吸入垃圾及在B处旋转所用时间,10秒钟完成了清扫任务.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/650b60e0-34a6-4c4c-a07e-a72c7a88cdce.png?resizew=169)
(1)B、C两处垃圾的距离是多少?(精确到0.1)
(2)智能扫地机器人此次清扫行走路线的夹角
是多少?(用反三角函数表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd66776565f049eb453c14fcaf79234.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/650b60e0-34a6-4c4c-a07e-a72c7a88cdce.png?resizew=169)
(1)B、C两处垃圾的距离是多少?(精确到0.1)
(2)智能扫地机器人此次清扫行走路线的夹角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
您最近一年使用:0次
2020-02-02更新
|
369次组卷
|
3卷引用:2016届上海市浦东新区高三4月高考模拟(二模)数学试题