1 . 在
中,边
所对角分别为
,若
,则
的形状为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/ac2aad19bff02f134ecbd628f283a180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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2 . 已知x∈R,设
,
,记函数
.
(1)求函数
取最小值时x的取值范围;
(2)设△ABC的角A,B,C所对的边分别为a,b,c,若
,
,求△ABC的面积S的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f8f15126b96ed528f9bbecf6c0577c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fecc48b4d230f09aad946568153c1b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638929b037d0f63a486aec2c645ccee5.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设△ABC的角A,B,C所对的边分别为a,b,c,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a7412ae4008dd65cad902ad132711a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
您最近一年使用:0次
2020-02-02更新
|
572次组卷
|
4卷引用:上海市市东中学2016-2017学年高三下学期第一次测验数学试题
3 . 已知
的面积为S,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8dbb139df841929984c6c82b7ef1a5f.png)
(1)求
的值;
(2)若
求
的面积S .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8dbb139df841929984c6c82b7ef1a5f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a65c3ce9120a934bceeab69bb7b59f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7106cf392f7133690289ca839fcf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
2020-02-02更新
|
228次组卷
|
2卷引用:2016届上海市虹口区高考一模数学试题
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)
您最近一年使用:0次
2020-02-01更新
|
211次组卷
|
4卷引用:2016届上海市黄浦区高三上学期期末调研测试(文)数学试题
5 .
中,已知
,边
,设
,
的周长为
.
(1)求函数
的解析式,并写出函数的定义域;
(2)求函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3a059203f65774fd8f321faa9e8041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6a5d91c35bf548b368a5c1ae8712cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
您最近一年使用:0次
6 . 在
中,
,
,
.
(1)求
边的长;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4346641491fc90d125ebbd06343382a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de81b52d5caf258f2e0a23dd700650fe.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
7 . 已知椭圆
:
的左、右焦点分别为
,
,离心率为
,过
且垂直于
轴的直线被椭圆
截得的线段长为1.
![](https://img.xkw.com/dksih/QBM/2020/1/31/2389062106529792/2389183410331648/STEM/5497be016e3f456d92f09b074dd7f0f9.png?resizew=216)
(1)求椭圆的标准方程;
(2)设
为椭圆上一点,若
,求
的面积;
(3)若
为钝角,求
点横坐标的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2020/1/31/2389062106529792/2389183410331648/STEM/5497be016e3f456d92f09b074dd7f0f9.png?resizew=216)
(1)求椭圆的标准方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b631d3f632c5a746410e630febdabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
名校
8 . 在
中,
分别是
所对的边,
为钝角,且
,则角
的大小为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba4f341a8ff41db3a4ed04e968e0fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
名校
9 . 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)
您最近一年使用:0次
名校
10 . 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)
您最近一年使用:0次
2020-01-30更新
|
319次组卷
|
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