名校
解题方法
1 . 已知点
分别在射线
(不含端点
)上运动,
,在
中,角
所对的边分别是
.
(1)若
是
和
的等差中项,且
,求
的值;
(2)若
,求
周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c85af1af436e945ec94dcf3a706d7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44ba031eb3ab51a567589485dc2f6d3.png)
![](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)
(1)若
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7f3b88eac5bd69db7c7e60eb498b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd5b9bbd3d22bd2cef53dd4b9691257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/307e247e-65dc-4113-9630-2fc28634bf53.png?resizew=144)
您最近一年使用:0次
2 . 《九章算术》“勾股”章有一题:“今有二人同立.甲行率七,乙行率三,乙东行,甲南行十步而斜东北与乙会,问甲乙各行几何?”大意是说:“已知甲、乙二人同时从同一地点出发,甲的速度为7,乙的速度为3,乙一直向东走,甲先向南走10步,后又斜向北偏东方向走了一段后与乙相遇.甲、乙各走了多少步? ” 请问乙 走的步数是
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-05-16更新
|
848次组卷
|
4卷引用:重庆市南岸区2019-2020学年高一上学期期末数学试题
名校
3 . 已知在
中,角
的对边分别为
,且
.
(1)求
的值;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/156720edc323e00e583e459ccc77656f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e9338495a7d0d08f15108dfd5bc548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
您最近一年使用:0次
2017-04-27更新
|
4006次组卷
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17卷引用:重庆市南华中学校2021-2022学年高一下学期第一次调研数学试题
重庆市南华中学校2021-2022学年高一下学期第一次调研数学试题2017届黑龙江省大庆市高三第三次教学质量检测(三模)数学(理)试卷黑龙江省大庆市2017届高三第三次教学质量检测(三模)数学(文)试题【全国百强校】河南省郑州外国语学校2018届高三调研考试数学(理科)试题黑龙江省大庆市铁人中学2019-2020学年高三上学期期中数学(理)试题2019届甘肃省天水市第一中学高三下学期最后一模考前练数学(理)试题2019届甘肃省天水市第一中学高三下学期最后一模考前练数学(文)试题陕西省商洛市商南高中2018-2019学年高三上学期期中数学(文)试题四川省新津中学2019-2020学年高一4月月考(入学)数学(文)试题四川省新津中学2019-2020学年高一4月月考(入学)数学(理)试题山东省滕州市第一中学2019-2020学年高一5月摸底考试数学试题黑龙江省大庆铁人中学2019-2020学年高一下学期期中考试数学试题江西省南昌市进贤县第一中学2019-2020学年高一下学期第三次月考数学(文)试题黑龙江省牡丹江市第一高级中学2019-2020学年高二7月月考(期末)数学(文)试题黑龙江省牡丹江一中2019-2020学年高二(下)期末数学(文科)试题山东省济南市第一中学2020-2021学年高一下学期期中数学试题苏教版(2019) 必修第二册 必杀技 第11章 解三角形 11.2 正弦定理 第11.2 节综合训练
4 . 如下图,已知四边形
是圆内接四边形,且
,
,
.现有以下结论:
![](https://img.xkw.com/dksih/QBM/2017/2/22/1629677457989632/1630213579374592/STEM/ef7cbff09970424995a891e3b5237e72.png?resizew=155)
①
,
两点间的距离为
;
②
是该圆的一条直径;
③
;
④四边形
的面积
.
其中正确结论的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4deb00f3cb0713b021d304f4a5aa1ac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0051d92c8639713847682826c2bb9783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c2b20aabf1834a48bb94783fae7403.png)
![](https://img.xkw.com/dksih/QBM/2017/2/22/1629677457989632/1630213579374592/STEM/ef7cbff09970424995a891e3b5237e72.png?resizew=155)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289d7a880379d6060065c829b45b0ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef812f839622326a7d7027cc806aaeb.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc4d6ae135f8b5f974cf2650477dd0c.png)
④四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8c922a02f6cc0c5035182db8779880c.png)
其中正确结论的个数为
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-02-23更新
|
451次组卷
|
2卷引用:【全国百强校】重庆市万州二中2017-2018学年高 2020级高一下学期 5 月数学(文)月考试题
11-12高一下·湖北·期中
名校
5 . 在
中,若
,则
是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a0e575b84d84cadae1456cd6639920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.等腰三角形 | B.等边三角形 |
C.直角三角形 | D.等腰三角形或直角三角形 |
您最近一年使用:0次
2016-12-05更新
|
648次组卷
|
15卷引用:重庆市江津第六中学2018-2019学年高一下学期期中数学试题
重庆市江津第六中学2018-2019学年高一下学期期中数学试题(已下线)2011-2012学年湖北省三校联考高一下学期期中理科联考数学试卷(已下线)2012年人教B版高中数学必修5 1.1正弦定理和余弦定理练习卷2015-2016学年黑龙江大庆实验中学高二上学期开学考试理科数学试卷2016-2017学年河北鸡泽县一中高二上学期期中数学试卷山西省太原市第五中学2016-2017学年高一5月月考数学试题2宁夏育才中学2016-2017学年高一下学期期末考试数学试题安徽省肥东市高级中学2017-2018学年高一下学期第二学段考试数学试题福建省龙岩市上杭二中2018-2019学年高二上学期期中考试理科数学试题【校级联考】浙江省嘉兴市七校2018-2019学年高一下学期期中考试数学试题【全国百强校】贵州省铜仁市第一中学2018-2019学年高一下学期期中考试数学试题上海市张堰中学2018-2019学年高一下学期5月月考数学试题广东省东莞市第四高级中学2020-2021学年高二上学期期中数学试题(已下线)第5讲+解三角形(练习)-【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)广西兴安县第二中学2020-2021学年高二上学期11月月考数学(文)试题
名校
6 . 如图,在凸四边形
中,
,
,
,
.设
.
![](https://img.xkw.com/dksih/QBM/2016/11/16/1573151326691328/1573151332982784/STEM/ec9df2404c3d495b8c3b41cf39a5121f.png)
(1)若
,求
的长;
(2)当
变化时,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b3bb79b07f60dec5c2ab1107da2ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07df5ad00c7959a7584f04eec20045f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27b8f4ddb7db4cba6754ae9dd4c1ea5.png)
![](https://img.xkw.com/dksih/QBM/2016/11/16/1573151326691328/1573151332982784/STEM/ec9df2404c3d495b8c3b41cf39a5121f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3609b3b292aa619b5c52d5ef9de5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2016-12-05更新
|
1548次组卷
|
4卷引用:重庆市第八中学校2021-2022学年高一下学期第二次月考数学试题
7 . 在
中,内角
对应的边长分别为
,已知
,
, ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31307a434d9bd734c863b3aee1f9705.png)
(1)求角
;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.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/26e0c9cb3fbe96f857428a844791a6ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e37ab58d987a58a72cc4230a8adee5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31307a434d9bd734c863b3aee1f9705.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
您最近一年使用:0次
2016-12-04更新
|
800次组卷
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4卷引用:重庆市万州区龙驹中学2019-2020学年高一下学期3月月考数学试题
8 . 给出下列四个命题,其中正确的命题是( )
①若
,则
是等边三角形;
②若
,则
是直角三角形;
③若
,则
是钝角三角形;
④若
,则
是等腰三角形;
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afee4c4ff52b90a5befcb0f29d5863f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/397fca77f42d61ad3ff5388cee5bf80e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1116215e558396687e4ca6fc8bbabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b883d9703a1deaf8dbc18097c6b8bb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.①② | B.③④ | C.①③ | D.②④ |
您最近一年使用:0次
解题方法
9 . 如图,在凸四边形
中,
,
为定点,
,
,
为动点,满足
.
![](https://img.xkw.com/dksih/QBM/2016/4/25/1572602882514944/1572602888470528/STEM/a83cf91f4fe848a9b4424aeb95ad46ca.png?resizew=99)
(1)若
,求
;
(2)设
和
的面积分别为
和
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.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/03c9cf2a1fb4e81750fba2022f9611f9.png)
![](https://img.xkw.com/dksih/QBM/2016/4/25/1572602882514944/1572602888470528/STEM/a83cf91f4fe848a9b4424aeb95ad46ca.png?resizew=99)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347f1001c7ef728ec091358493d3cb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ce61273bf61fe4c21726a052c24b6c.png)
您最近一年使用:0次
2016-12-04更新
|
521次组卷
|
2卷引用:2015-2016学年重庆市巴蜀中学高一3月月考理科数学试卷
名校
10 . 在
中,
分别为内角
所对的边,
,且满足
.若点
是
外一点,
,
,平面四边形
面积的最大值是.
![](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/b05d3b8f5c9df891ef6fbcaf12f43207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac73d1e1a6a7f2a941f4393dc4334998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa35755a33879e1d9e4fc93c28a4ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5811e450dcff0e190c3d7378c08797c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea16ceca816f7d3d50650af141baf42.png)
A.![]() | B.![]() | C.3 | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
887次组卷
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7卷引用:2015-2016学年重庆市巴蜀中学高一3月月考理科数学试卷