如图1,
绕点A逆时针旋转
,在此过程中
的对应点依次为A、
、
连接
,设旋转角为
,
,
与
之间的函数关系图像如图2,当
时,
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e7a123c9cc0e058db28841fb0edcf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020ebe1219437129358b986eb9e70bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e852150cadbbe518f15426cfc6d5da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757283ff842469efce9f3d4c96f65541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b3aa5ee83db0ed28f8f4ba8899af9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
A.4 | B.3 | C.![]() | D.![]() |
更新时间:2022-10-15 09:21:40
|
相似题推荐
单选题
|
较难
(0.4)
【推荐1】如图
,
为矩形
边
上的一点,点
从点
沿折线
运动到点
时停止,点
从点
沿
运动到点
时停止,它们运动的速度都是
若
、
同时开始运动,设运动时间为
,
的面积为
,已知
与
的函数关系图像如图
,则下列结论错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/b0b12770-5fa1-4ca9-9e5b-bc5e8b5799f4.png?resizew=363)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259bb63f8bbcabbbf13e84cdc46273a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0d7e9531a839d5deea44a7c2426378.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fb80b591b497d8d7a6d8592160de44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eacd892f03da01942140679667792250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/b0b12770-5fa1-4ca9-9e5b-bc5e8b5799f4.png?resizew=363)
A.![]() | B.![]() | C.当![]() ![]() | D.当![]() ![]() |
您最近一年使用:0次
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【推荐2】如图1,△ABC中,∠A=30°,点P从点A出发以2m/s的速度沿折线A→C→B运动,点Q从点A出发以a(cm/s)的速度沿AB运动,P,Q两点同时出发,当某一点运动到点B时,两点同时停止运动.设运动时间为x(s),△APQ的面积为y(cm2),y关于x的函数图象由C1,C2两段组成,如图2所示,下列结论中,错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/20/aae7c0ce-945e-4f14-b8e2-2a104bfa3b2a.png?resizew=436)
A.α=1 |
B.sinB=![]() |
C.△APQ面积的最大值为2 |
D.图2中图象C2段的函数表达式为y=﹣![]() ![]() |
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【推荐1】如图,在
中,
,
是斜边
上的高,角平分线
交
于点H,交
于点E,
于F,
交
于点G.下列结论中,正确的个数是( ).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/9a8b4db4-901b-43d8-bb66-4113cb52cee6.png?resizew=237)
(1)
,(2)
,(3)
,(4)
,(5)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e794eb0d9121a96f63d3094ea8f999e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46abd17495a147128f69e096f756b31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/6/9a8b4db4-901b-43d8-bb66-4113cb52cee6.png?resizew=237)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c9ea68cd9659d200587026b9c6ac4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3222a3eff6dff8ca459c41da2072f9d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e29cf02f18d6e348ca47e9ca6c6b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b824a85cb176ac5d06aa6e5b285647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417eb1ca6a7c82ce1971352c6258355e.png)
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次
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名校
【推荐2】如图,等边三角形ABC的边长为4,点O是△ABC三边中垂线的交点,∠FOG=120°,绕点O旋转∠FOG,分别交线段AB、BC于D、E两点,连接DE,给出下列四个站论:①OD=OE;②S△ODE=S△BDE;③四边形ODBE的面积始终等于
;④四边形ODBE周长的最小值为4+
.上述结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/5/28/2730539869208576/2794554552418304/STEM/2bd96d8c-6c5c-4474-9a8a-8a6fac44fddd.png?resizew=205)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c62821fa0d0a3316d030a6a20e4a62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c62821fa0d0a3316d030a6a20e4a62.png)
![](https://img.xkw.com/dksih/QBM/2021/5/28/2730539869208576/2794554552418304/STEM/2bd96d8c-6c5c-4474-9a8a-8a6fac44fddd.png?resizew=205)
A.①②③④ | B.①③ | C.①②④ | D.①③④ |
您最近一年使用:0次
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解题方法
【推荐1】如图,在Rt
和Rt
中,
,
,AB=AE=5.连接BD,CE,将△
绕点A旋转一周,在旋转的过程中当
最大时,△ACE的面积为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46197a0b7158ee7e5d1c67b15ea02b0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9fe609f7851c20ad9a6892f080a0ff.png)
A.6 | B.![]() | C.9 | D.![]() |
您最近一年使用:0次
单选题
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名校
【推荐2】如图,在矩形
中,
,
.把
沿
折叠,使点
恰好落在
边上的
处,再将
绕点
顺时针旋转
,得到
,使得
恰好经过
的中点
.设
交
于点
,连接
.有如下结论:①
;②
的长度是
;③
;④
.上述结论中,正确的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b3fa3410cdc4312c58becbaab71f7a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91d24f38b652894b62a4674ea6527700.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b435d7fc33860ae191f9111d880b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3923c57a6ad81dceb202ece8d2260eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9f2254db4904e59e76a2bd5dbcf18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71fe246270d1277f9eb2bf15af22e83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab9ade9bfd2479c0a61bf0601b46a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37cb0e2dfa80f0f60456db5d29e967a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ad8c18c35211f533cafcf5f65230f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/9/97723b0c-1b1d-4deb-8ae4-9415dd073416.png?resizew=201)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次