解题方法
1 . 如图是台球赛实战的一个截图.白球在
点处击中一球后,直线到达台球桌内侧边沿点
,反弹后直线到达台球桌内侧另一边沿点
,再次反弹后直线击中桌面上点
处一球.以台球桌面内侧边沿所在直线为坐标轴建立如图所示的平面直角坐标系.已知
,
.
![](https://img.xkw.com/dksih/QBM/2021/7/1/2754872792399872/2780215330521088/STEM/1ecd5ad9-6805-4445-8480-b614dd82b3fc.png?resizew=355)
(1)求直线
的方程;
(2)若点
的坐标是
,求
.
(提示:直线
与直线
的斜率互为相反数,
.)
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c59f0e35b7ae5206e45878934482b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8f8f9a0d33fe55f7734f6278db6c0.png)
![](https://img.xkw.com/dksih/QBM/2021/7/1/2754872792399872/2780215330521088/STEM/1ecd5ad9-6805-4445-8480-b614dd82b3fc.png?resizew=355)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da935dce772e193b50f397c5c13d938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
(提示:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bdb3995265a321989202ff01001013d.png)
您最近一年使用:0次
2021-08-06更新
|
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4卷引用:四川省达州市2020-2021学年高一下学期期末数学(文)试题
四川省达州市2020-2021学年高一下学期期末数学(文)试题四川省达州市2020-2021学年高一下学期期末数学(理)试题(已下线)专题2.5 直线的方程(二)-重难点题型精讲-2021-2022学年高二数学举一反三系列(人教A版2019选择性必修第一册)(已下线)专题2.5 直线的方程(二)-重难点题型精讲-2022-2023学年高二数学举一反三系列(人教A版2019选择性必修第一册)
2 . 银行一年定期的存款的利率为
,如果将
元存入银行一年定期,到期后将本利和再存一年定期,到期后再存一年定期……,则10年后到期本利共( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2021-08-04更新
|
175次组卷
|
2卷引用:四川省自贡市2020-2021学年高一下学期期末考试数学(文)试题
名校
3 . 如图,一载着重危病人的火车从
地出发,沿北偏东射线
行驶,其中
,在距离
地10公里北偏东
角的
处住有一位医学专家(其中
),现有紧急征调离
地正东
公里的
处的救护车赶往
处载上医学专家全速追赶乘有重危病人的火车,并在
处相遇,经计算当两车行驶的路线与
围成的三角形
面积
最小时,抢救最及时.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/3b8fde84-905e-447c-a6b3-9e099e3718f3.png?resizew=130)
(1)求
关于
的函数关系;
(2)当
为何值时,抢救最及时.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef966cdd137b3b10e290201b4d17542e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f584f913b804131ad1a7c6b67e14cb03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb802b0cd77d772dceff0d9ff6c879ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/3b8fde84-905e-447c-a6b3-9e099e3718f3.png?resizew=130)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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7卷引用:四川省自贡市2020-2021学年高一下学期期末考试数学(文)试题
四川省自贡市2020-2021学年高一下学期期末考试数学(文)试题四川省自贡市2020-2021学年高一下学期期末数学(理)试题(已下线)1.2 直线的方程(1)-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)2023版 北师大版(2019) 选修第一册 名师精选卷 第一单元 一次函数的图象与直线的方程 直线的倾斜角、斜率及其关系 直线的方程B卷江苏省扬州市第一中学2022-2023学年高二上学期期中数学试题湖北省郧阳中学、恩施高中、沙市中学、随州二中、襄阳三中2022-2023学年高二上学期10月联考数学试题湖北省五校(郧阳中学、恩施高中、沙市中学、随州二中、襄阳三中)2022-2023学年高二上学期10月月考数学试题
名校
解题方法
4 . 在
中,角A,B,C所对的边分别为
,
,
,
为
的外接圆,
,给出下列四个结论:
①若
,则
;
②若P在
上,则
;
③若P在
上,则
的最大值为2;
④若
,则点P的轨迹所对应图形的面积为
.
其中所有正确结论的序号是_________ .
![](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/35e1bd4f72b3edd9647378d1191857fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c0d9a3528b2f78a30afc3a8ad7ed2e.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821fa0301d20076ad2e541f8c4a86231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab3b7abd49187243f54931a8e2ae3e7.png)
②若P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2c545a5e92b066cb21323367640090.png)
③若P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2efbf5b18492c75432b0b0189df7262b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
其中所有正确结论的序号是
您最近一年使用:0次
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2卷引用:四川省凉山彝族自治州2020-2021学年高一下学期期末数学试题
名校
解题方法
5 . 已知
,
,记
,
,有下面四个结论:
①若
,则
的最大值为
;
②若
,则
的最小值为
;
③若
,则
的最大值为1;
④若
,则
的最大值为
.
则错误 结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4ac2076c1aac22c6aeea8463f8a93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660d67d3ef82ae086d22ebb711d6c4fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480d4714dada716c8b7621ed76d25a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aebf93c13c2f584155e63c39fa6004b.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a4c25fa7b7754fc55548e2497a9d6e.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8d7da24c485205172663f40a52c962.png)
则
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名校
6 . 国家主席习近平指出:中国优秀传统文化有着丰富的哲学思想、人文精神、教化思想、道德理念等,可以为人们认识和改造世界提供有益启迪.我们要善于把弘扬优秀传统文化和发展现实文化有机统一起来,在继承中发展,在发展中继承.《九章算术》作为中国古代数学专著之一,在其“商功”篇内记载:“斜解立方,得两壍堵.斜解壍堵,其一为阳马,一为鳖臑”.刘徽注解为:“此术臑者,背节也,或曰半阳马,其形有似鳖肘,故以名云”.鳖臑,是我国古代数学对四个面均为直角三角形的四面体的统称.在四面体
中,
平面
.
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760356260454400/2761304616468480/STEM/acdd4b31b8504295b1d47e95e3567ddf.png?resizew=455)
(1)如图1,若
、
、
分别是
、
、
三边的的中点,
在
上,且
,求证:
平面
;
(2)如图2,若
,垂足为
,且
,
,
,求直线
与平面
所成角的大小;
(3)如图2,若平面
平面
,求证:四面体
为鳖臑.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e1bf2cc650448488a19c6301125b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf468f5132e14ee1d8cc766808b11af.png)
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760356260454400/2761304616468480/STEM/acdd4b31b8504295b1d47e95e3567ddf.png?resizew=455)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec0d25fa88ea9f0b003b83b7e2fe88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f28f9f503c0a023ed7e78e48123cc95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/618c5704137191d21172232bdb26b4d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71807a35b3170fce28ee6edf4c00d083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
(3)如图2,若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1095b030f441de5fb223781b00f3dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb5255e2159617505e0c87d01437a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e1bf2cc650448488a19c6301125b31.png)
您最近一年使用:0次
2021-07-10更新
|
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|
2卷引用:四川省成都市第七中学2020-2021学年高一下学期期末考试数学试题
名校
解题方法
7 . 类比于二维平面中的余弦定理,有三维空间中的三面角余弦定理;如图1,由射线
,
,
构成的三面角
,
,
,
,二面角
的大小为
,则
.
、
时,证明以上三面角余弦定理;
(2)如图2,平行六面体
中,平面
平面
,
,
,
①求
的余弦值;
②在直线
上是否存在点
,使
平面
?若存在,求出点
的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa26fadeee2becc192fa53d778445d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac229a5e782559ffb0f271cbfc01c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6ab2d197160f40b72fe0abb3fe527d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e14113e0a7ac6b8e1faf51dbcc6dbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cc100e36303b3566d91e4756594cf2.png)
(2)如图2,平行六面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3c9e7c05de9838c0c5d762720d3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947c03e48c4be7485f1547817f890c53.png)
②在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f475878dd1b32b0486cbf7b5ffbedd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee3d1518e197f7f25c341da6b1e3483.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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12卷引用:四川省成都市第七中学2020-2021学年高一下学期期末考试数学试题
四川省成都市第七中学2020-2021学年高一下学期期末考试数学试题(已下线)第八章立体几何初步章末题型大总结(精讲)(2)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)江苏省无锡市市北高级中学2022-2023学年高一下学期期中数学试题海南省海口市海南中学2023-2024学年高一下学期第二次月考(6月)数学试题湖南省长沙市雅礼中学等十六校2022届高三下学期第二次联考数学试题(已下线)专题24 立体几何解答题最全归纳总结-3(已下线)专题08 立体几何解答题常考全归类(精讲精练)-2湖南省重点高中2023届高三下学期高考模拟数学试题山东省多校2023-2024学年高二上学期9月联合测评数学试题(已下线)重难点突破06 立体几何解答题最全归纳总结(九大题型)-3(已下线)重难点12 立体几何必考经典解答题全归类【九大题型】河南省安阳市2024届高三第三次模拟考试数学试题
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解题方法
8 . 节分端午自谁言,万古传闻为屈原;路漫漫其修远兮,吾将上下而求索;亦余心之所善兮,虽九死其尤未悔
.端午节是传统节日中富有刚健气息的节日.习近平总书记曾在多个场合引用屈原诗作名句阐述思想、寄情言志.辛丑端午,让我们重温这些名言隽句,感悟总书记深沉的家国情怀.端午节吃粽子,赛龙舟寄寓了对屈原的怀念.粽子主要材料是糯米、馅料,用籍叶包裹而成,形状多样,主要有尖角状、四角状等.四川流行四角状的粽子,其形状可以看成一个正四面体,现需要在粽子内部放入一个肉丸,肉丸的形状近似地看成球,当这个肉丸的体积最大时,其半径与该正四面体的高的比值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee7bb49247387a9028602315729f8d7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:四川省成都市第七中学2020-2021学年高一下学期6月阶段考试数学试题
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9 . 下列说法正确的是( )
A.不存在四个面都是直角三角形的三棱锥 | B.共点的三条直线可确定1个或3个平面 |
C.四边形确定一个平面 | D.异面直线所成角的取值范围为![]() |
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2021-06-22更新
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3卷引用:四川省成都市第七中学2020-2021学年高一下学期6月阶段考试数学试题
四川省成都市第七中学2020-2021学年高一下学期6月阶段考试数学试题 沪教版(2020) 必修第三册 精准辅导 期末测试(已下线)第二章 立体几何中的计算 专题一 空间角 微点2 异面直线所成角综合训练【基础版】
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10 . 如图在小岛的正北方向上
的
处有一艘货轮,为了躲避礁石,该货轮沿南偏西
的方向航行,小岛
有一艘快艇沿北偏西
角方向行驶给货轮运送补给,双方无线电约定在点
处完成补给.货轮得到补给后将原航行方向顺时针旋转
向
地运送物资.
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734330199605248/2745509264318464/STEM/1a40f93654724929abbdd2fbdd4723cd.png?resizew=554)
(1)如图,若
地恰好在小岛
的正西方向上,满足
,求
两地的距离和
的正切值;
(2)如图
,若
地恰好在小岛
的西偏南
方向上,记
,令
,计算当
时,
的值;
(3)如图
,设
的面积为
,计算当
时,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2afb7c93cbdc3be446346ecc7f1696d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a468a3f205065a4eac93d46b1c909b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ec10dca211ffb7d7e0c690b5ef4460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734330199605248/2745509264318464/STEM/1a40f93654724929abbdd2fbdd4723cd.png?resizew=554)
(1)如图,若
![](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/b7f2125dfe51596f77b060572f706cbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)如图
![](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/798fb30c165c5c82d174236acd193041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0314c25563725d09d2fdd8f37ab48cb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e09f3fe44cb03b27b994c76c6ec2eb1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706de1dfc08a6b821a43e08d7bf390d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a76b8027a664ebe27b23e6842cbb9fb.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0575a0a359247cbf6ee653e9548cb77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82c28ac079a8062edfce9e544c63095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0575a0a359247cbf6ee653e9548cb77c.png)
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