1 . 已知
三个内角
,
,
的对边分别为
,
,
, 且
.
(1)求角
,
(2)若
=
,
的面积为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.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/e6c46387c6065e6a75b92b86566d2e5a.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9178fc8b5d65aa75fa9196294a0db7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9c6fe12d3a9727e00ef87a630302ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c495bbbfef06b0fdabfff48f312e63b0.png)
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2 . 已知
中,
,则
=_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7ac57e9ee5102e2661a55028997383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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3 . 已知
中,角
的对边分别为
,且
.
(1)求证:
; (2)若
,试求
.
![](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/02746ec8e4220d8b4a174d5e9a711ed2.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce2c41378db9c5966ec60ad7e4bd197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cb21ae875f36d52d0b6f82b0201d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd36cbaece7cf0bd8c0a86a1f4ceaac.png)
您最近一年使用:0次
4 . 已知
,那么
的值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e176ee04eb947f918a7ff6db6ffda18e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258f7dd295360a0fa22a811dcffa3ac1.png)
您最近一年使用:0次
2019-04-27更新
|
334次组卷
|
2卷引用:【市级联考】湖北省天门市、潜江市、应城市2018-2019学年高一下学期期中联考数学试题
5 . 下列不等式中,正确的是
①
②
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5b06ae3e0d4d579d641481ca6b4a83.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35920afff438a528c30f2eeb390aa983.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa113085b5d7194bf4805828eb67e0e.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5b06ae3e0d4d579d641481ca6b4a83.png)
A.①③ | B.①② | C.②③ | D.①②③ |
您最近一年使用:0次
6 . 已知
.
(1)请通过降幂化简
;
(2)求函数
在
上的最小值并求当
取最小值时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dee3f0c2e4eb695c056557c213533e2.png)
(1)请通过降幂化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1dae53646520828e503d9a8ad45294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
7 . 下列命题成立的是
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
名校
8 . 已知
且
均为锐角![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
(
)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d8d24b6d6dd0717c226569e345d9f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249a140d6d30530e4f67c8325308d476.png)
求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab4d71338499f31d37f88730ee280aaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d8d24b6d6dd0717c226569e345d9f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249a140d6d30530e4f67c8325308d476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a490119734a6399dbcb8998974e28eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
您最近一年使用:0次
2019-04-22更新
|
838次组卷
|
2卷引用:【校级联考】湖北省四校(襄州一中、枣阳一中、宜城一中、曾都一中)2018-2019学年高一下学期期中联考数学试题
9 . 已知
,函数
在
上单调递减,则
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50eccd64a3cf43e96b6c069d2bfba275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc299018cae8bc47faa38c156b355ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-04-17更新
|
928次组卷
|
3卷引用:湖北省重点中学沃学联盟2021-2022学年高三上学期期中联考数学试题
名校
10 . 已知
中,
,
,
的对边分别是
,
,
,且
,
,
,则
边上的中线的长为
![](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/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fc97c111826fb6d39bf72ed9ad5585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a74c3e9a8f3f11e98b4fa659a97679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2019-03-27更新
|
1808次组卷
|
5卷引用:【校级联考】湖北省部分重点中学2018-2019学年高一下学期期中考试数学试题