名校
1 . △ABC的内角A,B,C所对的边分别为a,b,c,且
.
(I)求△ABC的面积;
(II)若sinA:sinC=3:2,求AC边上的中线BD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3885c9e3d7f5cd5b7494a712ba9c9d8.png)
(I)求△ABC的面积;
(II)若sinA:sinC=3:2,求AC边上的中线BD的长.
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2017-02-08更新
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3卷引用:河北省滦平县第一中学2023届高三下学期2月月考数学试题
名校
2 . 如图,在凸四边形
中,
,
,
,
.设
.
![](https://img.xkw.com/dksih/QBM/2016/11/16/1573151326691328/1573151332982784/STEM/ec9df2404c3d495b8c3b41cf39a5121f.png)
(1)若
,求
的长;
(2)当
变化时,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b3bb79b07f60dec5c2ab1107da2ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07df5ad00c7959a7584f04eec20045f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27b8f4ddb7db4cba6754ae9dd4c1ea5.png)
![](https://img.xkw.com/dksih/QBM/2016/11/16/1573151326691328/1573151332982784/STEM/ec9df2404c3d495b8c3b41cf39a5121f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3609b3b292aa619b5c52d5ef9de5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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2016-12-05更新
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1546次组卷
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4卷引用:2017届河北武邑中学高三周考10.9数学(文)试卷
3 . 如图,在
中,
是边
的中点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/9/637ec8a5-2cd2-4014-b181-5ee835e9576d.png?resizew=220)
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf1455904a482b66b5bf83000a1b077.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/9/637ec8a5-2cd2-4014-b181-5ee835e9576d.png?resizew=220)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e2f2d7147cf1699fbfdef9cf4af74.png)
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2016-12-02更新
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1492次组卷
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4卷引用:2014-2015学年河北省唐山市开滦二中高一下学期期中考试数学试卷1
2014-2015学年河北省唐山市开滦二中高一下学期期中考试数学试卷12014-2015学年河北省唐山市开滦二中高一下学期期中考试数学试卷2(已下线)2014届广东省广州市普通高中毕业班综合测试二理科数学试卷(已下线)【全国百强校】广东省深圳市深圳中学2018-2019高二第二学期第一次月考试理科数学试题
10-11高一下·新疆·开学考试
4 . 如图,在
中,
,
,点
在线段
上,且
,
.
![](https://img.xkw.com/dksih/QBM/2016/11/16/1573151083978752/1573151089786880/STEM/9b2fb2b8ab0f4b86a9571006c53e87e3.png?resizew=180)
(1)求
的长;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a24c0ac0386be95d7d67d0c8817d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f157aab917082b835f4213ed81a3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8045e841107e17eb8170d0b582a0e38.png)
![](https://img.xkw.com/dksih/QBM/2016/11/16/1573151083978752/1573151089786880/STEM/9b2fb2b8ab0f4b86a9571006c53e87e3.png?resizew=180)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba05eed0b25ee0ee6b0e7fcd09fda1ec.png)
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