如图,在平面四边形
中,若
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/6342577e-fa4a-4aa2-a22c-31b44111c8e0.png?resizew=160)
(1)求B;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7d2a2da5144f0bf6ce091c56b3d5a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde9cb64ad52176fdef71b7446207b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb65a18b5e1a45ac1178765dff7d8d2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/6342577e-fa4a-4aa2-a22c-31b44111c8e0.png?resizew=160)
(1)求B;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e294887ab065cedf03b77f49292bc6a9.png)
22-23高一下·安徽·阶段练习 查看更多[4]
安徽省皖北县中联盟2022-2023学年高一下学期3月联考数学试卷安徽省淮南市田家庵区淮南第一中学2022-2023学年高一下学期3月月考数学试题广东省深圳外国语学校(集团)龙华高中部2022-2023学年高一下学期学段(一)数学试题(已下线)专题05 解三角形在几何与实际中的应用(1)-期中期末考点大串讲
更新时间:2023-03-21 22:09:25
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名校
【推荐1】已知函数
(![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf2058673db86c374d93bce60efbcc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c16cc7ecce3766b1de269db898c26d.png)
)的部分图象如图所示.
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585241616531456/2591483450277888/STEM/5780362e46ff407a8381c17b8fe64216.png?resizew=166)
(1)求函数
的解析式;
(2)求函数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76374954e084e4a2818e311ef99223e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf2058673db86c374d93bce60efbcc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c16cc7ecce3766b1de269db898c26d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93778ac16acb542c259b9c4c49b410b3.png)
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585241616531456/2591483450277888/STEM/5780362e46ff407a8381c17b8fe64216.png?resizew=166)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71432f091ff99748fa0af07043e6f4bb.png)
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【推荐2】如图,
是单位圆O上的点,C,D分别是圆O与x轴的两交点,
为正三角形.
![](https://img.xkw.com/dksih/QBM/2018/11/27/2084522361585664/2089014872637440/STEM/beb6099a265644f1b8425ec8ca4bedfe.png?resizew=168)
(1)若
点坐标为
,求
的值;
(2)若
,四边形CABD的周长为y,试将y表示成x的函数,并求出y的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb398137779190b35492d9f06d5fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
![](https://img.xkw.com/dksih/QBM/2018/11/27/2084522361585664/2089014872637440/STEM/beb6099a265644f1b8425ec8ca4bedfe.png?resizew=168)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ceadd6c12d4333d8ca2211ba7e69e54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84398c8a4d89abf190d7e2ef9ae82571.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd1e201f6763cdc281a3733000266d1.png)
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解题方法
【推荐1】已知
外接圆直径是
,角
,
,
所对的边分别为
,
,
,满足
.
(1)求角
;
(2)求
的周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/8834e33d2b1af1d394316c733fecc6a8.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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解题方法
【推荐2】在
中,角
的对边分别是
,且
.
(1)求角
的大小;
(2)若
,
,
是边
的中点,求
的长.
![](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/b8b03788075e1a80f1209759cb30ba7e.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.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/03902478df1a55bc99703210bccab910.png)
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【推荐3】已知
,
,
,其中
,若
的最小正周期为
.
(1)求函数
的单调递减区间;
(2)锐角
中,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be7f395fe4a358d1c6fca7f5eda84ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a85ef1db2cfd56955a8c70897a481c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4189bb81a139b117b20a688a60c768f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95d37b2f8d5da8eaa07442b941017c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e3d87be9f706832ef25537d78a201b.png)
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【推荐1】
的内角
的对边分别为
.
(1)若
,求
面积的最大值;
(2)若
,求
的值.
![](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/126a516af18974021ff32bc068eba500.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b21cae6f2bcb919420b760941a7751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
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解题方法
【推荐2】在△ABC中,a、b、c分别是A、B、C的对边,且a2+c2-b2+ac=0
(1)求角B的大小;
(2)若△ABC中sinC=2sinA,且b=
,求a的值.
(1)求角B的大小;
(2)若△ABC中sinC=2sinA,且b=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01961669cd597f61fa48e9853d678bb8.png)
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【推荐1】某贫困地区几个丘陵的外围有两条相互垂直的直线型公路
,
,以及铁路线上的一条应开凿的直线穿山隧道
,为进一步改善山区的交通现状,计划修建一条连接两条公路
,
和山区边界的直线型公路
,以
,
所在的直线分别为
轴,
轴,建立平面直角坐标系
,如图所示,山区边界曲线为
,设公路
与曲线
相切于点
.
![](https://img.xkw.com/dksih/QBM/2020/4/12/2439978641367040/2440141794664448/STEM/847c6cd0a3f64de7884728514ac38825.png?resizew=172)
(1)设公路
交
轴,
轴分别为
两点,若公路
的斜率为-1,求
的长;
(2)当公路
的长度最短时,设公路
交
轴,
轴分别为
,
两点,并测得四边形
中,
,
,
千米,
千米,求应开凿的隧道
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42914df0d7d5132a543f6498369a7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/4/12/2439978641367040/2440141794664448/STEM/847c6cd0a3f64de7884728514ac38825.png?resizew=172)
(1)设公路
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb398137779190b35492d9f06d5fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaff41080fdea43eea7efedf9ebc1498.png)
(2)当公路
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/a02b1139e07e431b5d4276757b232bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f6b41579de11a99e8c8672c44e1247a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35db79eb06bc4973f8ab5a20f5006ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1945d7a560e1171df93bf237d218b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd687b3df76e4f752bcc63778661516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐2】如图,矩形ABCD区域内,D处有一棵古树,为保护古树,以D为圆心,DA为半径划定圆D作为保护区域,已知
m,
m,点E为AB上的动点,点F为CD上的动点,满足EF与圆D相切.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/2f2b3450-1b63-4509-8e0e-a0328559d16b.png?resizew=188)
(1)若∠ADE
,求EF的长;
(2)当点E在AB的什么位置时,梯形FEBC的面积有最大值,最大面积为多少?
(长度精确到0.1m,面积精确到0.01m²)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f325403cbedaac249c9a78d33da81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbab64c34b6317ee4c68ba7f8d56c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/17/2f2b3450-1b63-4509-8e0e-a0328559d16b.png?resizew=188)
(1)若∠ADE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320b9b41adcc95db178692859eae76ec.png)
(2)当点E在AB的什么位置时,梯形FEBC的面积有最大值,最大面积为多少?
(长度精确到0.1m,面积精确到0.01m²)
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