名校
1 . 对于
有如下命题,其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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2021-07-20更新
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2卷引用:吉林省松原市长岭县第三中学2020-2021学年高一下学期期末数学试题
名校
解题方法
2 . 已知在
中,角A,
,
的对边分别是
,
,
,
,若
,则
外接圆的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/02147711f051c91a66c2de084c6c25b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-01-19更新
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158次组卷
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4卷引用:吉林省乾安县第七中学2020-2021学年高二上学期期末考试数学(理)试卷
解题方法
3 . 在
中角
,
,
的对边分别为
,
,
,
,角
的平分线交
于点
,
.
(1)求角
的大小.
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/da48400bdf008b043796cf3a550fcd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27695066fdfd0357bdb22469c4a67c5.png)
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2021-01-17更新
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3卷引用:吉林省乾安县第七中学2020-2021学年高二上学期期末考试数学(理)试卷
名校
4 . 在
中,
,
,
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264381eddf150479287e20be0007ef90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347f1001c7ef728ec091358493d3cb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.5 |
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2020-12-23更新
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5卷引用:吉林省乾安县第七中学2020-2021学年高二上学期期末考试数学(理)试卷
名校
解题方法
5 . 已知
、
、
为
的三内角,且其对边分别为
,
,
,若
.
(1)求角
的大小;
(2)若
求
的面积的最大值.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.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/b915e3dfd90cf56f76bb85a4655d5054.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e8be242f8d51e61de930f1a7dc0302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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6 . 在
中,
的对边分别为
,若
,则
的外接圆的面积为 ____________ .
![](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/4dbdc3b449e9f2814ae5d3ceb2a2a7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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7 . 在△ABC中,角A,B,C的对边分别为a,b,c,已知
=2,cos B=
,△ABC的周长为5,则b的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291ba8755981dfc475aba139af8629da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
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名校
8 . 在
中,若
,
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3371592e18d2764183bd1f04874f55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09d3176074ac8b37cccdea181f1dffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.1 | C.![]() | D.2 |
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2020-09-01更新
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253次组卷
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6卷引用:吉林省松原市乾安县第七中学2020-2021学年高二上学期第一次教学质量检测数学(文)试题
9 . △ABC中,a=7,c=3,且
=
.
(1)求b;
(2)求∠A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0cc59416b30310683b6c24080758a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
(1)求b;
(2)求∠A.
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2020-08-30更新
|
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17卷引用:2016-2017学年吉林乾安县七中高二文上期中数学试卷
2016-2017学年吉林乾安县七中高二文上期中数学试卷(已下线)2010-2011年云南省芒市中学高一下学期期中考试数学北京市第四中学2016-2017学年高一下学期期中考试数学试题山西省怀仁县第八中学2016-2017学年高一(普通班)下学期期末考试数学试题重庆市铜梁一中2018-2019学年高一3月月考数学试题【校级联考】四川省广元市万达中学、八二一中学2018-2019高一下学期期中考试数学试题新疆生产建设兵团农八师一四三团第一中学2018-2019学年高一下学期期中考试数学试题陕西省延安市黄陵县黄陵中学高新部2018-2019学年高一下学期期末数学试题宁夏六盘山高级中学2019-2020学年高二上学期期中数学(理)试题江苏省淮安市涟水县第一中学2019-2020学年高一下学期期初测试数学试题贵州省遵义市凤冈县第一中学2019-2020学年高一6月强化训练数学试题(已下线)第01章解三角形(A卷基础篇)-2020-2021学年高二数学必修五同步单元AB卷(人教A版,浙江专用)安徽省宣城六校2019-2020学年高一下学期期中联考数学试题(已下线)6.3.1正弦定理(作业)-【上好课】2020-2021学年高一数学下册同步备课系列(沪教版2020必修第二册)(已下线)专题9.3《解三角形》(A卷基础篇)-2020-2021学年高一数学必修第四册同步单元AB卷(新教材人教B版)北京师范大学遵义附属学校2020-2021学年高一下学期第一次月考数学试题(已下线)第六章平面向量及其应用(知识通关)(2)
10 . 在
中,角
,
,
的对边分别是
,
,
,
.
(1)求角
的大小;
(2)若
,
,求
,
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/82aa7c840ac54361f3a78a15515ab848.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5b763032c085a1e60822d8dc1b3605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4376af85e07b29051a812ff3fcda61a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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2020-08-04更新
|
195次组卷
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2卷引用:吉林省松原市扶余市第一中学2019-2020学年高一下学期期中考试数学试题