名校
1 . 已知函数
的部分图象如图所示,若
,
,则
的值为
![](https://img.xkw.com/dksih/QBM/2017/5/21/1691845107138560/1691985318109184/STEM/d774f635aa574667ba06ebca17d4499c.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0938adc94addd49009749608c3598fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26c7a2b72dec34ac13f001055bf75412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12edd82d8569e5e0281041fd627a9b17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1588a932802c18025ef77bdb042e80a2.png)
![](https://img.xkw.com/dksih/QBM/2017/5/21/1691845107138560/1691985318109184/STEM/d774f635aa574667ba06ebca17d4499c.png?resizew=167)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-03-24更新
|
940次组卷
|
5卷引用:2017届江西省九校(分宜中学、玉山一中、临川一中、南城一中、南康中学、高安中学、彭泽一中、泰和中学、樟树中学)高三联考数学(理)试卷
解题方法
2 . 在
中,角
的对边分别为
,若
成等差数列,且
.
(1)求角
;
(2)求
.
![](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/ceb9438ed7c4280bcfccbf7b830b6ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bee0974b07d1298cd1d406119cd8a8e.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ea513ef4c8fc4d8c31eff498740680.png)
您最近一年使用:0次
解题方法
3 . 在△
中,
分别为角
所对的边,若
,则此三角形一定是 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/5b74f6929393d07a9399ae179479bf71.png)
A.正三角形 | B.直角三角形 |
C.等腰三角形 | D.等腰或直角三角形 |
您最近一年使用:0次
2016-12-04更新
|
425次组卷
|
5卷引用:江西省宜春市2019-2020学年高三5月模拟考试数学(理)试题
解题方法
4 . 在
中,角
的对边分别为
,
,
的面积为
.
(1)求
的值;
(2)求
的值.
![](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/e661bbeca6adb364f1910ae18377d289.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23725094c363fd158166a8698971694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e4123975f257306440158659634c4a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cda097a4e7c41100e573d8304ee066.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed872ebf364b8df2c8f6363baee3c4de.png)
您最近一年使用:0次
5 . 在
中,角
所对的边分别为
,已知
.
(1)求
的大小;
(2)若
,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/8/7/1572203343724544/1572203349131264/STEM/e004c50657294137aa8b341be517b441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edd51c782333e04862704165622ad68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbf5887ebf0a2fb425dc594bb983585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb46adaa950730fa67a694a90c5cbd4.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2015/8/7/1572203343724544/1572203349131264/STEM/759815b1ffb549fdbe815c355056afb6.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2015/8/7/1572203343724544/1572203349131264/STEM/4823cf5276784aec9113393dc310f029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
您最近一年使用:0次
解题方法
6 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a1f3bd0b58c5e78a80302a635ecc158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85616cb6105f1061d093d27534217d5c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2013·江西南昌·二模
7 . 设等差数列
满足:
,公差
.若当且仅当
时,数列
的前
项和
取得最大值,则首项
的取值范围是
![](https://img.xkw.com/dksih/QBM/2015/1/14/1571960237998080/1571960243707904/STEM/538bd3651569410ba2b8562cabd1aa00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ca741c3d108d142217317ca12cd1818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4438236d49542476c11a5dbdcc6a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294250dbd576bff3da0a1456cb9a88a5.png)
![](https://img.xkw.com/dksih/QBM/2015/1/14/1571960237998080/1571960243707904/STEM/538bd3651569410ba2b8562cabd1aa00.png)
![](https://img.xkw.com/dksih/QBM/2015/1/14/1571960237998080/1571960243707904/STEM/6c95d3c3ccf44261ac94e5c71a9c1ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-02更新
|
1450次组卷
|
7卷引用:2013届江西南昌10所省重点中学高三第二次模拟突破冲刺理科数学(八)
(已下线)2013届江西南昌10所省重点中学高三第二次模拟突破冲刺理科数学(八)(已下线)2013届福建省高三高考压轴理科数学试卷2015届安徽省马鞍山二中等高三上学期统一考试理科数学试卷2015届河北省唐山市一中高三12月调研考试理科数学试卷2016届安徽省六安一中高三下组卷三理科数学试卷2015年全国高中数学联赛黑龙江赛区预赛试题(已下线)专题7.17 数列与三角函数的综合-2022届高三数学一轮复习精讲精练
2013·江西南昌·二模
名校
解题方法
8 . 函数
的部分图象如右图所示,设
是图象的最高点,
是图象与
轴的交点,记
,则
的值是
![](https://img.xkw.com/dksih/QBM/2013/4/19/1571189207621632/1571189212798976/STEM/42a1137de6a6414abc306f6b999fbd7d.png?resizew=224)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5516a25b99990276edfc238cb976b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd319ee6fd036660b982f251f5d975b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a080cab44a7d3605430d67b207f9be.png)
![](https://img.xkw.com/dksih/QBM/2013/4/19/1571189207621632/1571189212798976/STEM/42a1137de6a6414abc306f6b999fbd7d.png?resizew=224)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2011·江西九江·一模
9 . 设向量
,
,且
.
(1)求
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3916e938bd26ab60e1ce6df016d82823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c2ec4fe6722dc72ed2c1a6b904d882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67128653c4d2ef313a09d4c8081aefc6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68060a3aed2fb3a2507ca02371f0596e.png)
您最近一年使用:0次