1 . 在
中,
,
,
分别为角
,
,
的对边,若
,
,
,则
的周长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/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/5b903021571c1b57943a1a3274217654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019eb94a6a2b38308811470d860e1a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.20 | B.30 | C.40 | D.25 |
您最近一年使用:0次
2020-12-21更新
|
199次组卷
|
3卷引用:四川省天府名校2020-2021学年高三上学期12月诊断性考试文科数学试题
2 . 如图是隋唐天坛,古叫圜丘,它位于唐长安城明德门遗址东约950米,即今西安市雁塔区陕西师范大学以南.天坛初建于隋而废弃于唐末,比北京明清天坛早1000多年,是隋唐王朝近三百年里的皇家祭天之处.某数学兴趣小组为了测得天坛的直径,在天坛外围测得
米,
米,
米,
,
,据此可以估计天坛的最下面一层的直径
大约为( ).(结果精确到1米)
(参考数据:
,
,
,
)
![](https://img.xkw.com/dksih/QBM/2020/12/17/2616085458804736/2618313926557696/STEM/cf087acf924740e0bfeb49c60a243b88.png?resizew=182)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25a3debb802dd4f3e774b16ad1c154ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667c50b897a3e209018f0ee09d37e73d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2aea5dc133fdded83d5453ee447deff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52881be613aa404e553da30d8987cfad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/368763128d1ad0ffad5d859fef834d0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923557f74987174405af890c9a772c48.png)
![](https://img.xkw.com/dksih/QBM/2020/12/17/2616085458804736/2618313926557696/STEM/cf087acf924740e0bfeb49c60a243b88.png?resizew=182)
A.39米 | B.43米 | C.49米 | D.53米 |
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2020-12-20更新
|
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14卷引用:百校联盟2020-2021学年高三教育教学质量监测考试12月全国卷(新高考)数学试题
百校联盟2020-2021学年高三教育教学质量监测考试12月全国卷(新高考)数学试题黑龙江省实验中学2020-2021学年高三下学期2月月考试题(线上) 数学(文) 试题陕西省西安工业大学附属中学2021-2022学年高一下学期3月月考数学试题(已下线)专题21 数学文化(客观题)-2021年高考数学(文)二轮复习热点题型精选精练(已下线)专题22 数学文化(客观题)-2021年高考数学二轮复习热点题型精选精练(新高考地区专用)(已下线)专题23 数学文化(客观题)-2021年高考数学(理)二轮复习热点题型精选精练福建省福州格致中学2020-2021学年高一下学期期中考数学试题江苏省南通市如皋中学2020-2021学年高二下学期第二次阶段考试数学试题江西省宜春市第九中学2020-2021学年高一下学期第一次月考数学试题(已下线)第21讲 解三角形应用举例(讲)- 2022年高考数学一轮复习讲练测(课标全国版)重庆市第七中学校2022届高三上学期期中数学试题福建省厦门大学附属科技中学2021-2022学年高一3月考数学试题云南省大理州祥云县2020-2021学年高二上学期期末统测数学(理)试题云南省大理州祥云县2020-2021学年高二上学期期末统测数学(文)试题
名校
解题方法
3 . 已知
,
,
,
,过点
作
垂直
于点
,点
满足
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d89f0127f43c56777566f10fa5be3b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/324a78724c020110495965a205092fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b704c9791db263a9c595d62f87711c4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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15卷引用:江淮十校2020-2021学年高三联考数学理科试题
江淮十校2020-2021学年高三联考数学理科试题山西省运城市景胜中学2022届高三上学期11月月考数学(理)试题江西省南昌市第十中学2022届高三下学期第一次月考数学(理)试题江西省南昌市第十中学2022届高三下学期第一次月考数学(文)试题江苏省扬州市宝应县安宜高级中学2022-2023学年高三上学期第三次阶段考试数学试题浙江省杭州第二中学2023届高三下学期3月月考数学试题江西省万载县第二中学2021届高三上学期第一次质量检测数学(理)试题安徽省江淮十校2020-2021学年高三上学期第二次质量检测理科数学试题(已下线)专题04 平面向量的数量积(客观题)-2021年高考数学二轮复习热点题型精选精练(新高考地区专用)(已下线)专题04 平面向量的数量积(客观题)-2021年高考数学(理)二轮复习热点题型精选精练(已下线)专题04 平面向量的数量积(客观题)-2021年高考数学(文)二轮复习热点题型精选精练江苏省南通市西亭高级中学2020-2021学年高三上学期省模考模拟一数学试题江苏省南京市雨花台中学2022-2023学年高三上学期“零模”模拟调研数学试题山东省莱西市第一中学2021-2022学年高一下学期期中考试数学试题江苏省南通西藏民族中学2022-2023学年高三上学期阶段测试数学试题
名校
解题方法
4 . 如图,在
中,
,
,
,
为边
的中点,
为中线
的中点,则向量
的模为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/4ad891d9-fa40-4645-b400-4feaad64434e.png?resizew=105)
![](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/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb3a156336d41abd8a7256c592cc83a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/4ad891d9-fa40-4645-b400-4feaad64434e.png?resizew=105)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
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4卷引用:百师联盟2021届一轮复习(二) 全国卷III理数试题
名校
解题方法
5 . 在正方体
中,点
为线段
的中点,则异面直线
与
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
A.0 | B.![]() | C.![]() | D.![]() |
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3卷引用:西南名师联盟2021届高考实用性文科数学联考卷(二)
6 . 已知
中,角
,
,
所对的边分别是
,
,
.若
,且
,则
( )
![](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/f754c64bc88071a88b65a7e54ed82886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cdc3b28634ec2046b49856fb6cd2ebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f774cd650f14c8f6e4fe0c6a432768bb.png)
A.![]() | B.![]() | C.![]() ![]() | D.不存在 |
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解题方法
7 . 设锐角三角形
三个内角
,
,
所对的边分别为
,
,
,若
,
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/fe1172d26ef23ba951b5ec19d43ec5a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fadd2e6f0aa16c2c466c904474ffc79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2卷引用:百师联盟2021届高三 一轮复习联考(一) 理数全国卷III试题
名校
解题方法
8 . 在钝角三角形
中,
,
,
分别为角
,
,
的对边,且其面积为
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/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/a5f69ac7b3a2fee5ee96b398321dbb2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c6ce02259a85ea191541f4a708738f1.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7卷引用:河南省重点高中2020-2021学年高二年级阶段性测试(一)理数试题
名校
解题方法
9 . 若
的面积为
,且
为钝角,
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0864876d3bd75a14e8fae15b2e334ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b246aa3b56becc905d3fb64c6d5ec4a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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|
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6卷引用:河南省豫南九校2020-2021学年高二上学期第一次联考(9月)数学(文)试题
名校
解题方法
10 . 设
的内角
,
,
所对的边分别为
,
,
.若
,
,则
( )
![](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/f0b52ce4e6ac3fd9198703454e794a7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82f5744572e6103f4438758cf0be2a1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/facd1fcfad659e95da18c38e5eb157b8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:全国百强名校“领军考试”2019-2020+学年高二下学期数学(6月)文科试题