名校
解题方法
1 . 已知
的内角A,B,C所对的边分别为a,b,c,且
.
(1)求角B的大小;
(2)若
为钝角三角形,______,求
外接圆的半径R的取值范围.
请在下列两个条件中选择一个作为条件补充在横线上,并解决问题.①
;②
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8dbd14a2da3f4fdf0c88799e66a5762.png)
(1)求角B的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
请在下列两个条件中选择一个作为条件补充在横线上,并解决问题.①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4a4f66bbaec57120052c925c25c656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7137607b9cd60dc8919d475c083dd7.png)
您最近一年使用:0次
2022-05-27更新
|
1849次组卷
|
3卷引用:华大新高考联盟2022届名校5月高考押题卷数学试题
解题方法
2 .
中,
,若
,则
边上的高的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898cb22ba09ab5d8808029e11d64db29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2022-05-27更新
|
298次组卷
|
2卷引用:东北三省四市教研联合体2022届高三下学期模拟试卷(二)文科数学试题
3 . △ABC中,
,若
,则AB边上的高的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898cb22ba09ab5d8808029e11d64db29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
A.2 | B.3 | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 在①
,②
,③
这三个条件中任选一个,补充在下面的问题中,并作答.如果多选,则按第一个解答给分.
已知
的内角A,
,
的对边分别为
,
,
,且______
(1)求
;
(2)
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2bc596f2dee0005fd979c07b62e46c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299b8e719c44bb9d0094d3fffe0366ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7526a47e8e9674d3a62b42d8cf3a097.png)
已知
![](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)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5daacfca03b233bee267ed7410cd43c7.png)
您最近一年使用:0次
2022·全国·模拟预测
解题方法
5 . 记△ABC的内角A,B,C的对边分别为a,b,c,已知
.
(1)求A;
(2)若
,求△ABC的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0640fb38a11c4f32256deeb3068f8e96.png)
(1)求A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ceb5c44babdc7bc7b6a6ad90565512.png)
您最近一年使用:0次
解题方法
6 . 已知△ABC的内角A,B,C所对的边分别为a,b,c,
.
(1)求角A的大小;
(2)若
,AD=2,且AD平分∠BAC,求△ABC的面积.
注:三角形的内角平分线定理:在△PQR中,点M在边QR上,且PM为∠QPR的内角平分线,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a65d0af67b929ef1e12d1ffd20e0d7d.png)
(1)求角A的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c290cdc4cf3d6b82581e68ecaf5c7f7.png)
注:三角形的内角平分线定理:在△PQR中,点M在边QR上,且PM为∠QPR的内角平分线,有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f4bc5c8a8060542dd3b862bc037421.png)
您最近一年使用:0次
2022-05-18更新
|
655次组卷
|
4卷引用:豫南大联考2022届高三下学期毕业班理科数学试卷
名校
解题方法
7 . 在
中,内角A,B,C所对的边分别为a,b,c,已知
.
(1)求
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea4dc19f6c30a09ea95628b8a200a03.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcacbf5fefcfb626c3e2f88f850e58c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
您最近一年使用:0次
2022-05-18更新
|
1136次组卷
|
8卷引用:河南省焦作市2022届高三三模理科数学试题
名校
8 . 在《九章算术》中,将底面为矩形且有一条侧棱与底面垂直的四棱锥称为“阳马”.如图,在“阳马”
中,
底面
,
,
是棱
的中点,点
是棱
上的动点,则当
的周长最小时,三棱锥
外接球的表面积为( )
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981496153989120/2982089805701120/STEM/183f811cd71a400b80f33bb4d541e5db.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c57c9d48424df6610a3c9ec326ec242d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b115316e0fcd2ef46a4dd383472996e4.png)
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981496153989120/2982089805701120/STEM/183f811cd71a400b80f33bb4d541e5db.png?resizew=184)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2022-05-18更新
|
1432次组卷
|
10卷引用:河南省焦作市2022届高三三模理科数学试题
河南省焦作市2022届高三三模理科数学试题河南省焦作市2022届高三下学期第三次模拟考试文科数学试题2022届全国大联考高中毕业班考前定位联合考试文科数学试题2022届全国大联考高中毕业班考前定位联合考试理科数学试题河南豫北高中2021-2022学年高三毕业班考前定位联合考试数学试题(文)河南豫北高中2021-2022学年高三毕业班考前定位联合考试数学试题(理)(已下线)专题14 《九章算术》-“堑堵”、“鳖膈”、“阳马”山东省新泰市第一中学2021-2022学年高一下学期第二次质量检测数学试题(已下线)模块六 立体几何 大招6 运动中找不变量(已下线)第19讲 空间图形的表面积和体积
2022·全国·模拟预测
解题方法
9 . 在
中,角
所对的边分别为
,
.
(1)若
,
,求
;
(2)若
,且
为锐角三角形,求
的取值范围.
![](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/c2231bb73f0209352b4d79c52bc8cd4b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
您最近一年使用:0次