1 . 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: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)
(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
名校
解题方法
2 . 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
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5卷引用: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)
(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2016届上海市徐汇区高考一模(理科)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
3 . 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
|
367次组卷
|
3卷引用:上海市南汇中学2020-2021学年高一下学期期末数学试题
4 . 在△
中,若
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646400351c4d045715f00c4148d42677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
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2020-02-01更新
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211次组卷
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4卷引用:沪教版(2020) 必修第二册 高效课堂 第六章 三角 6.4 复习与小结(1)
名校
5 . 如图所示,在塔底
测得山顶
的仰角为
,在山顶测得塔顶
的仰角为
,已知塔高
米,则山高![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57b4243fa7f6f9c73d11f3123c42ddb.png)
_______ 米.
![](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/21c602b48548556c0464f0d761a2b8fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4630b9ca3d20635161fa8fbf812b9128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57b4243fa7f6f9c73d11f3123c42ddb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/a0e8dae2-fa77-451c-bdb3-68ed1a914607.png?resizew=207)
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名校
6 . 若长度为
,
,
的三条线段可以构成一个锐角三角形,则
取值范围是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b490440a453077cb01c3e6c935879d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a52375105b3c5a2c8b6dcad63d0ec2a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66bca960a698136c0ab1051e2744edbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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2020-01-30更新
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318次组卷
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3卷引用:上海市复旦大学附中2016-2017学年高一下学期期中数学试题
7 .
中,若
,
,
,则
的面积![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda09302202d7ccfe1fbc325a31964a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
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8 . 在
中,若
,则
范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2264c134952d41fb9bcb90e6c72c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2122e3f1e76a635e58e4d54aa594c552.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 如图,某广场中间有一块绿地
,扇形
所在圆的圆心为
,半径为
,
,广场管理部门欲在绿地上修建观光小路:在
上选一点
,过
修建与
平行的小路
,与
平行的小路
,设所修建的小路
与
的总长为
,
.
![](https://img.xkw.com/dksih/QBM/2020/1/17/2379204645494784/2380290213404672/STEM/869836c4828d4a35a4a1cffa23b11fcf.png?resizew=149)
(1)试将
表示成
的函数
;
(2)当
取何值时,
取最大值?求出
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d162c29b1e484cfc87350dd68f00b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394d49b7b16d3871b3795b1b7fa2078d.png)
![](https://img.xkw.com/dksih/QBM/2020/1/17/2379204645494784/2380290213404672/STEM/869836c4828d4a35a4a1cffa23b11fcf.png?resizew=149)
(1)试将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eda0e46e3df694508999a522ba5a3af.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
您最近一年使用:0次
名校
10 . 在
中,角
,
,
的对边分别为
,
,
,且满足
,
.
(1)求角
的大小;
(2)若
,试判断
的形状;
(3)若
为钝角三角形,求实数
的取值范围.
![](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/95d37b2f8d5da8eaa07442b941017c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27b5e973abbbd3d1d4a028647004fde.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d03149142fda4b23311ae538e88937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-01-18更新
|
524次组卷
|
2卷引用:上海市格致中学2016-2017学年高一下学期期中数学试题