1 . 在
中,若
,
,其面积为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f2f1eb2beb23690f56a68dc7da08cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c13fadefec9d4bad9149b6d5cd3e0e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 在
中,角
,
,
的对边分别为
,
,
,且
.
(1)求
;
(2)若
且
,求
边上高
;
(3)若点
在
上,满足
为
的平分线,
且
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/866489c57088a1d233da0012d838d69c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b05d3b8f5c9df891ef6fbcaf12f43207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5156599f6e2ddba26303be4760c29dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
解题方法
3 . 如图所示,某镇有一块空地
,其中
,
km,
,当地镇政府规划将这块空地改造成一个旅游景点,拟在中间挖一个人工湖
,其中
,
都在边
,
上,且
,挖出的泥土堆放在
地带上形成假山,剩下的
地带开设儿童游乐场,为安全起见,需在
的一周安装防护网.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/553a0321-a5a6-4f81-9924-267d4f60f9f5.png?resizew=114)
(1)当
时,求防护网的总长度;
(2)若要求挖人工湖用地
的面积是堆假山用地
的面积的
倍,试确定
的大小;
(3)为节省投入资金,人工湖
的面积要尽可能小,问如何设计施工方案,可使
的面积最小?最小面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ecf7d59234f76e997e02e9709f1a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3393af6d2e25ea81810c2f04c329840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b0eb72986587ffecf87c22a224bcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf2b5e712b42f748a3c30bb5d160c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c29e963e1871b415c086bc600d16bd5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/553a0321-a5a6-4f81-9924-267d4f60f9f5.png?resizew=114)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d3f2cfb6f2626da6a6a4cc26711114.png)
(2)若要求挖人工湖用地
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92f279be7c8a11dcd2c0a97116bdcbb.png)
(3)为节省投入资金,人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
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解题方法
4 . 如图,某城市有一条(MO)从正西方通过市中心O后转向东偏北
方向(ON)的公路,为使城市交通更便捷,现准备修建一条绕城高速公路
,两个进出口A,B分别设在MO,ON上,A,B 两点间设服务区P,现已知B在A的东偏北
方向上,A,B两点间的高速公路可近似看成一条直线段.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/057666c4-0d6a-4c35-b7de-37f98282127a.png?resizew=151)
(1)当OP最短距离为
km时,求线段AB的最短距离,并求出此时
的值;
(2)若要求服务区P设在∠AOB的平分线与AB的交点位置,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583554f0fde521bd4d9e9f0c85a32bcb.png)
,
,求B到市中心O的距离最大时tan
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/057666c4-0d6a-4c35-b7de-37f98282127a.png?resizew=151)
(1)当OP最短距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e4123975f257306440158659634c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)若要求服务区P设在∠AOB的平分线与AB的交点位置,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583554f0fde521bd4d9e9f0c85a32bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a1c661ae3c97ef812c2cd514e5105e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa90ab486652985640858da2c1cd9b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
名校
解题方法
5 . 已知
的内角
的对边分别为
,
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/145cfd649a73a04947676cf97b594732.png)
,则
( )
![](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/3568f51bde4e391c8f08ff3d55989aef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/145cfd649a73a04947676cf97b594732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b04872ecc84dadf8c229539abb3b3ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c59beadd1aae5c5ae24ef7bc007e02.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-04-15更新
|
724次组卷
|
3卷引用:湖北省黄冈市部分高中2022-2023学年高一下学期期中联考数学试题
6 . 已知向量
,且
.
(1)求
的值;
(2)若
,求角
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062651547c11069ef2054a9df1dfbea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7cb5138a03b19266f82223899a614f7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af21db22b7a71ce7e52a9ec3c728a4f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd7c74dea533b13598fc7ecadf1285b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
您最近一年使用:0次
7 . 向量
满足
,则
的值可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a0e99babbfa675a31fe1b49661683a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26abac73b9cb1af5c5d8e8c2dd136bbb.png)
A.3 | B.2![]() | C.6 | D.3![]() |
您最近一年使用:0次
2023-04-15更新
|
266次组卷
|
2卷引用:湖北省黄冈市部分高中2022-2023学年高一下学期期中联考数学试题
8 . 在
中,内角
,
,
的对边分别为
,
,
,点
是
中点.
,
.
(1)求
;
(2)再从条件①、条件②中选择一个作为已知条件,求边
.
条件①
的面积为
;条件②
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56989ac686b974427284333d0af32a5e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)再从条件①、条件②中选择一个作为已知条件,求边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
条件①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
您最近一年使用:0次
2023-04-15更新
|
500次组卷
|
3卷引用:湖北省黄冈市部分高中2022-2023学年高一下学期期中联考数学试题
湖北省黄冈市部分高中2022-2023学年高一下学期期中联考数学试题四川省成都市成都市第十二中学2022-2023学年高一下学期期中数学试题(已下线)专题05 解三角形大题常考题型归类-期期末考点大串讲(人教B版2019必修第四册)
9 . 我国古代数学家赵爽在注解《周髀算经》一书时介绍了“赵爽弦图”,它是由四个全等的直角三角形与一个小正方形拼成的大正方形如图所示,记直角三角形较小的锐角为
,大正方形的面积为
,小正方形的面积为
,若
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/ea847f47-1e56-4ab7-b9db-a9dd363f8b65.png?resizew=118)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c59a974aa034d7e878a2c26d156cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561c987a117a69acc5799c8a5b58001b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/ea847f47-1e56-4ab7-b9db-a9dd363f8b65.png?resizew=118)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
10 . 在
中,内角
所对的边分别为
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
A.![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2023-04-15更新
|
1418次组卷
|
3卷引用:湖北省黄冈市部分高中2022-2023学年高一下学期期中联考数学试题