1 . 成都市为迎接2022年世界大学生运动会,需规划公路自行车比赛赛道,该赛道的平面示意图为如图的五边形
,根据自行车比赛的需要,需预留出
,
两条服务车道(不考虑宽度),
,
,
,
,
为赛道,
,
,
,
.注:
为千米.
![](https://img.xkw.com/dksih/QBM/2021/7/27/2773464684183552/2775955893829632/STEM/469aa52c9ba54c88bad18e6bd46594df.png?resizew=208)
(1)若
,求服务通道
的长;
(2)在(1)的条件下,求折线赛道
的最长值(即
最大).(结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b496737614e6d3b823e5a28f245c4636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d8332bf70ea360b452b85e20a7d081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5195a231802caa64e45806f233ac2d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635f7d1535df78e526a904b627e43ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fe30c67ac20cd4e8b9cc2d0d420a7b.png)
![](https://img.xkw.com/dksih/QBM/2021/7/27/2773464684183552/2775955893829632/STEM/469aa52c9ba54c88bad18e6bd46594df.png?resizew=208)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aaf727cca163a124d70f055f3cb45dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)在(1)的条件下,求折线赛道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfda5a702b4667cf789a826677a1e20.png)
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2 . 若锐角
的边长分别为
、
、
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
3 . 在
中,角A,B,C满足
,则角C=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12742a58429a71d3f295b724256a37e5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 在
中,
是A,B,C所对的边,且
,
,
,则角
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af039cad52ca4e1f1e322277bc81afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810a2cc3f61a961c1196fbd0e11caabb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() |
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5 . 在
中,
,
,
为
中点,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.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/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a27dc396251a4453094d19baa79816.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-07-30更新
|
726次组卷
|
3卷引用:四川省眉山市2020-2021学年高一下学期期末数学(文)试题
解题方法
6 . 设锐角
的内角
、
、
的对边分别为
、
、
,
.
(1)求
;
(2)若
,
,求
的值.
![](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/696bf7c8ee1492b2ad2bb74d28ea8d49.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bef7d1579b001d2633646c3a4bc400c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
名校
解题方法
7 . 如图在
中,
,
,
,点
在边
上,点
在
的延长线上,
交
于
,设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/55066dd0-c79e-42fa-95c2-494ae141bec7.png?resizew=195)
(1)若
,求
的最小值;
(2)若
与
面积相等,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a6f36741b86f464be362b12bac13d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f8f90945248cc2efad926c27f6b15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54c556458d8075aa2d133615725f8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fe1fdf6c1a18510973a1c3cae9356b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b318bd45da07ef4c8ddd386e03d595.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/55066dd0-c79e-42fa-95c2-494ae141bec7.png?resizew=195)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b9d5aaaceaa3ac514d17fcfefbf9b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28baa3ec1ef83511eff382dcc0c885be.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3677f2a2a1b4aef3a370a03db832366.png)
您最近一年使用:0次
2021-07-29更新
|
280次组卷
|
3卷引用:四川省眉山市2020-2021学年高一下学期期末数学(文)试题
8 . 如图,据气象部门预报,在距离某码头南偏东
方向
处的热带风暴中心正在以
的速度向正北方向移动,距风暴中心
以内的地区都将受到影响.据以上预报估计,从现在起多长时间后,该码头将受到热带风暴的影响,影响时间为多长?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb63bd437c84536c4c348bd11303b5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f556397b620f452bd4b06c9233bc2ffb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c53b89b8687dd0ec2e1a4b5b8e8cb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/7a0cab5d-53fe-4ad9-aa6c-7355ef99627c.png?resizew=177)
您最近一年使用:0次
2021-07-29更新
|
199次组卷
|
2卷引用:四川省眉山市2020-2021学年高一下学期期末数学(文)试题
解题方法
9 . 在
中,内角
所对的边分别为
,下列条件中能说明
为直角三角形的条件有_________ (写出所有符合条件的序号)
①
;
②
;
③
;
④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/15c0dbe3c080c4c4636c64803e5c1f76.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/397fca77f42d61ad3ff5388cee5bf80e.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c238771872727273748302e037754e5c.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a4b2d15296889d7e6277f1259e134.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c49273c4ff2165dda30e6c6d0411bb72.png)
您最近一年使用:0次
2021-07-29更新
|
248次组卷
|
2卷引用:四川省眉山市2020-2021学年高一下学期期末数学(文)试题
10 . 如图,一艘海船从
出发,沿北偏东75°的方向航行60nmile后到达海岛
,然后从
出发,沿北偏东15°的方向航行
nmile后到达海岛
,下次航行直接从
出发到达
.
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760356260454400/2761304616345600/STEM/75866f8f-ecb4-41d6-94f1-38996a38e752.png?resizew=262)
(1)求需要航行多少距离?
(2)此船应该沿怎样的方向航行.(角度精确到0.1)
参考答案:
,
,
.
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760356260454400/2761304616345600/STEM/75866f8f-ecb4-41d6-94f1-38996a38e752.png?resizew=262)
(1)求需要航行多少距离?
(2)此船应该沿怎样的方向航行.(角度精确到0.1)
参考答案:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb0f3b22fbaadd7a57923f757649f08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c08b88470fc23c2c564306fb8348a865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ca652f42dd8fcf61241c02886c3cce.png)
您最近一年使用:0次