名校
解题方法
1 . 若
的面积为
,且
为钝角,则
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2399f71125b424fd17c5da2ae796e5ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b246aa3b56becc905d3fb64c6d5ec4a.png)
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2020-03-22更新
|
662次组卷
|
3卷引用:黑龙江省哈尔滨第九中学2019-2020学年度高三上学期第二次考试文科数学试卷
名校
解题方法
2 . 在
中,a,b,c分别是内角A,B,C的对边,
.
(1)求角B;
(2)若
为锐角三角形,且
,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e57c06c723d6c5265d9150abc9e6cb.png)
(1)求角B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2020-03-15更新
|
394次组卷
|
3卷引用:黑龙江省哈尔滨第九中学2019-2020学年度上学期高三第二次月考数学理试题
名校
解题方法
3 . 在
中A,B,C的对边分别是a,b,c,若
,则
的形状为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/174526cf4c59a3907476ac75b61e08ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.等腰三角形 | B.直角三角形 | C.锐角三角形 | D.等腰直角三角形 |
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解题方法
4 .
的内角A,B,C的对边分别为a,b,c,且
,若
周长的最大值为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa7e6b2daad2af88ea5245430dc2ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388590e0f8d9dfeaf2b65f80648257d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
A.4 | B.![]() | C.![]() | D.5 |
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名校
解题方法
5 . 在锐角
中角A,B,C的对边分别为a,b,c,
.
(1)求角A的大小;
(2)若
,求
周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12749eca2cd4dc67a83b365c81cce3c5.png)
(1)求角A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2019高三上·全国·专题练习
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解题方法
6 . 在
中,
,则
形状是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4584d40994efc7d52e04307d454e3a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
A.钝角三角形 | B.直角三角形 | C.锐角三角形 | D.无法确定 |
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2020-03-04更新
|
592次组卷
|
5卷引用:2020届黑龙江省哈尔滨师范大学附属中学高三上学期期中数学(理)试题
2020届黑龙江省哈尔滨师范大学附属中学高三上学期期中数学(理)试题2020届黑龙江省哈尔滨师范大学附属中学高三上学期期中数学(文)试题(已下线)2020届高三12月第01期(考点04)(文科)-《新题速递·数学》江西省宜春市上高二中2021-2022学年高一4月第七次月考数学试题辽宁省沈阳市第二中学2022-2023学年高一下学期第二次阶段测试数学试题
名校
解题方法
7 . 已知锐角三角形
的内角
,
,
的对边分别为
,其外接圆半径
满足
.
(1)求
的大小;
(2)已知
的面积
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187d9f548f2716cfe3f70e9eb74a4c37.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b0834226fdf282206cd790166c8d05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
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2020-02-27更新
|
1316次组卷
|
7卷引用:黑龙江省鹤岗市第一中学2020-2021学年高三上学期第一次月考数学(文)试题
名校
8 . 如图,已知
、
、
、
四点在同一条直线上,且面PAD与地面垂直,在山顶
点测得点
、
、
的俯角分别为
、
、
,并测得
,
,现欲沿直线
开通穿山隧道,则隧道
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/51843280-ece3-43a8-ab13-0719da1f6512.png?resizew=224)
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/996bf3d35b6763cbc1a423b13a9df2dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c20e88a33043f4279fff360c81006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1afce2c04721d08936f3d1cba165d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a9cc3ffd7cfd7fbbe8801984dfbe15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/51843280-ece3-43a8-ab13-0719da1f6512.png?resizew=224)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-10-17更新
|
718次组卷
|
6卷引用:黑龙江省哈尔滨市第六中学校2020-2021学年高三9月月考数学(文)试题
黑龙江省哈尔滨市第六中学校2020-2021学年高三9月月考数学(文)试题黑龙江省哈尔滨市第六中学2020-2021学年度高三上学期九月月考文科数学试题北京市中国人民大学附属中学2016-2017学年高一下学期期中考试数学试题(已下线)热点04 三角函数与解三角形-2021年高考数学【热点·重点·难点】专练(山东专用)(已下线)第13课时 课后 余弦定理、正弦定理应用举例苏教版(2019) 必修第二册 过关斩将 第11章 本章达标检测
名校
9 . 在
中,角
,
,
所对的边分别为
,
,
,满足
.
(1)求角
的大小;
(2)若
,求
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/d50e8251dd3b2a5351b2ddbbe3e404ea.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
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2020-02-21更新
|
440次组卷
|
2卷引用:黑龙江省鹤岗市第一中学2019-2020学年高一下学期期末考试数学(文)试题
10 . 如图所示,某海滨城市位于海岸
处,在城市
的南偏西20°方向有一个海面观测站
,现测得与
处相距31海里的
处,有一艘豪华游轮正沿北偏西40°方向,以40海里/小时的速度向城市
直线航行,30分钟后到达
处,此时测得
、
间的距离为21海里.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/3702d2de-b5fa-4217-89c4-a54714b6348f.png?resizew=163)
(Ⅰ)求
的值;
(Ⅱ)试问这艘游轮再向前航行多少分钟方可到达城市
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/3702d2de-b5fa-4217-89c4-a54714b6348f.png?resizew=163)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395c8d0c2d490ffd4d6aadfb3517f9ec.png)
(Ⅱ)试问这艘游轮再向前航行多少分钟方可到达城市
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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