1 . 如图,在
中,
,点
在线段
上,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9c2a69627bae05b27deebd10a82088.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb57ce31e0865ce48d83bf44aa0cab9.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://staticzujuan.xkw.com/quesimg/Upload/formula/2c9c2a69627bae05b27deebd10a82088.png)
![](https://img.xkw.com/dksih/QBM/2017/7/15/1730611009839104/1731550975311872/STEM/e778dfd4f7234c4f9ba3b1e203118ccd.png?resizew=145)
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2016-12-04更新
|
311次组卷
|
2卷引用:吉林省吉林市长春汽车经济开发区第六中学2016-2017学年高一下学期期末考试理数试题
2 . 如图,有一辆汽车在一条水平的公路上向正西行驶,汽车在
点测得公路北侧山顶D的仰角为
,汽车行驶300m后到达
点测得山顶D恰好在正北方,且仰角为
,则山的高度
为
![](https://img.xkw.com/dksih/QBM/2015/11/10/1572284645310464/1572284650840064/STEM/1e82d2054cd7441ba8caeb9cb029836d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7408f4e5fbc936c79089b25ecb1cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6fdfbf0ea031149dd4a8f8235fae73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2015/11/10/1572284645310464/1572284650840064/STEM/1e82d2054cd7441ba8caeb9cb029836d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
455次组卷
|
2卷引用:吉林省吉林市长春汽车经济开发区第六中学2016-2017学年高一下学期期末考试文数试题
3 . 在△ABC中,内角A,B,C对边的边长分别为
为锐角,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a884b50024e3bf8c46b8885ee37d6647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429155fc3ca4ceb11fdd751e1c76769c.png)
, 则
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac587bb0b7b8e672db3d99bc39373a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a884b50024e3bf8c46b8885ee37d6647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429155fc3ca4ceb11fdd751e1c76769c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5668ec1b0dd1b7a94fe11f2b35c862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
A.等腰三角形 | B.等边三角形 | C.直角三角形 | D.等腰直角三角形 |
您最近一年使用:0次
2016-12-03更新
|
190次组卷
|
2卷引用:吉林省吉林市长春汽车经济开发区第六中学2016-2017学年高一下学期期末考试理数试题
10-11高一上·吉林·期末
4 . 已知△ABC的三个顶点分别为A(2,3),B(-1,-2),C(-3,4),求
(Ⅰ)BC边上的中线AD所在的直线方程;
(Ⅱ)△ABC的面积.
(Ⅰ)BC边上的中线AD所在的直线方程;
(Ⅱ)△ABC的面积.
您最近一年使用:0次
2016-11-30更新
|
304次组卷
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4卷引用:2010年吉林省吉林一中高一上学期期末考试数学卷
(已下线)2010年吉林省吉林一中高一上学期期末考试数学卷(已下线)2011-2012学年山东省恒台第二中学高一上学期期末数学试卷2015-2016学年河北省唐山市迁安二中高一上学期期末数学试卷2015-2016学年湖南省衡阳市衡阳县高一上学期期末数学试卷
5 . 若x, y满足约束条件
,则z=x+2y的取值范围是( )
![](https://img.xkw.com/dksih/QBM/2017/7/5/1730758466355200/1740057207341056/STEM/31e018d578454c1a9a9ccd743b9bff25.png?resizew=106)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 在
中,
,
,
为三个内角
为相应的三条边,若
,且![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/0e31d5f438e44b2eb87b5a5e7da86b37.png)
(1)求证:
;
(2)若
,试将
表示成
的函数
,并求
值域.
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/98ddb10b45724512b6ea68c025f58314.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/31264a6f37ad4d14a3242ac71a90ce43.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/682635c87a6049938bdad1a2790e6636.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/731d1ecdaea2486eab7862a5663f2782.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/3ae43d74c2f84a8ea045184e21551dd4.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/cfcb5e1b12dd434780db7e34bb61bbe8.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/0e31d5f438e44b2eb87b5a5e7da86b37.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/1055ed7aeb40408190d9ee738e366091.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/54ac7218e4224e2bb87688eb48fc7678.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/0fb9b196c1164d23a423f9eed588c9e8.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/731d1ecdaea2486eab7862a5663f2782.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/9db534ec91e546178c0a52d920df653b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/24/1572496155541504/1572496161685504/STEM/9db534ec91e546178c0a52d920df653b.png)
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