解题方法
1 . 在
中,角
的对边分别为
,且
,
(1)求角B的大小;
(2)若
的面积为
,且
,求
的周长.
![](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/b7a8a40b999c8a9722db9afad5b6c494.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/802e162b98c280720fcb909cf392fda3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71812e0762c0aaffb51cfef66156567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-07-05更新
|
450次组卷
|
4卷引用:陕西省商洛市2022-2023学年高一下学期期末数学试题
解题方法
2 . 在
中,设角A,B,C所对的边分别为a,b,c,
,且
.
(1)求角A;
(2)若D为AB的中点,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74001235baccc1fa58c12ee354bc28e0.png)
(1)求角A;
(2)若D为AB的中点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-02-06更新
|
299次组卷
|
3卷引用:陕西省商洛市2022-2023学年高二上学期期末理科数学试题
解题方法
3 . 在
中,角A,B,C所对的边分别为a,b,c,
.
(1)证明:
;
(2)求角B的最大值,并说明此时
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d1be53927ad5b4557b8fc7e219bac.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/988b7e964e313579ab8869d67d5be007.png)
(2)求角B的最大值,并说明此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2022-12-13更新
|
241次组卷
|
4卷引用:陕西省洛南中学2022-2023学年高二上学期期末数学(理)试题
解题方法
4 . 已知函数
.
(1)若
为钝角,且
,求
的值;
(2)若
,
均为锐角,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5adb1f7879963b37dd6e326c16af25.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/694d1ab90e2d050af6cd0250051ac566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac093c7f63943402694f2de7aabc75b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c52740e831cfbff471bc961623ddc4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f11702dad2d3204ae56294509742ee.png)
您最近一年使用:0次
2022-07-05更新
|
336次组卷
|
4卷引用:陕西省商洛市2021-2022学年高一下学期期末数学试题
名校
解题方法
5 . 若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536e072eb0439a5e5b430cd55a129374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54ffc6424628fb0fe43f043345ae2322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b729f3bcad3527fd911eb71de25a64f9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-07-12更新
|
592次组卷
|
5卷引用:陕西省商洛市2020-2021学年高一下学期期末数学试题
6 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092d3b874d89fc3472fe97b5de797d8e.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092d3b874d89fc3472fe97b5de797d8e.png)
您最近一年使用:0次
7 . 已知向量
,
,函数
.
(1)求
图象的对称中心;
(2)若动直线
与函数
和函数
的图象分别交于
、
两点,求线段
的长度的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950c4deb86065a5744ac5efd88327075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d4e17a588edfdffaf472e0f0613f768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae9f908aabcd9d9c46a0ecdfd1d6c12.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若动直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba11c2daebf7c599a8cfd0e9a27417ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea77f7c0c1869055781ceb4b3d7ced7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2020-08-16更新
|
242次组卷
|
2卷引用:陕西省商洛市2019-2020学年高一下学期期末数学试题
名校
8 . 已知
,
,若对任意的
,
恒成立,则角
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f67f212641e151243c701cfea23676e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7299f9e1d5264afcf021f5654d432af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4021ba9b344ed17a6f7de06936b00a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7db0589d9f4526cd05ce4a3e86a72e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2019-09-26更新
|
462次组卷
|
6卷引用:陕西省商洛市2018-2019学年高一下学期期末教学质量检测数学试题