题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051429-21981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051430-21034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051430-45497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051430-50401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051430-93152.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051431-22791.png)
(II)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051431-56268.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051431-44124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051431-32652.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051431-65918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051432-39578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051432-32051.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051432-59190.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051432-38810.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051432-68938.png)
(2)由(1)可得
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051433-85450.png)
由正弦定理得
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051433-34839.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051433-86691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051433-37799.png)
在
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051433-47880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051434-68421.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051434-54577.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051434-45319.png)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051426-67940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051426-79158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051427-82746.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051420-52931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051420-36101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051420-55127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051420-28438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051420-24199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051420-57896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051420-87435.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051411-11019.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051411-37055.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051411-53437.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051411-11019.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051403-57297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051403-30844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051404-61369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051404-34747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051404-18519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051404-84202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051405-71651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051403-57297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051405-94889.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051400-41264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051400-25263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051400-20290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051400-86865.png)
最新试题
- 1阅读理解 Successful people in international business underst
- 2 We have to stay at home instead of going finishing because
- 3一个微型吸尘器中的直流电动机的额定电压为U,额定电流为I,线圈电阻为R,将它接在电动势为E,内阻为r的直流电源的两极间,
- 4直角三角形两直角边边长分别为6cm和8cm,则连接这两条直角边中点的线段长为( )A.10cmB.3cmC.4cm
- 5秦国能够灭掉六国,统一全国的主要原因是()A.人民饱受战争之苦,渴望统一安定B.经商鞅变法,秦国实力日益强盛C.用人制度
- 6阅读下列材料。材料一 欧洲的商人和殖民者在欧亚非美之间建立了直接的商业联系……初步形成了一个广阔的世界市场;欧洲的商路和
- 7下图表示________与________之间的气***换,箭头A是指________血流动的方向,B指________气
- 8把下列实验所用仪器的名称填在横线上.(1)吸取或滴加少量液体时需要用 ______;(2)测量液体的温度需用 _____
- 9We"re _____ at the _____ news that Saddam was sentenced to d
- 10在做“研究匀变速直线运动”的实验中:(1)电火花计算器工作电源是______V的______电源(填“直流”或“交流).
热门考点
- 1下列物质中不属于有机物的是( )A.亚硝酸钠B.甲醛(HCHO)C.葡萄糖(C6H6O6)D.甲烷CH4
- 2既是生物的最基本特征,又是生物区别于非生物的重要标志的是( )A.应激性B.生长C.繁殖D.新陈代谢
- 3一组数据3,4,x,6,8的平均数是5,则这组数据的中位数是( )A.4B.5C.6D.7
- 4我国科学家在世界上第一次为一种名为“钴酞菁”的分子(直径为1.3 nm)恢复了磁性。“钴酞菁”分子的结构和性质与人体内的
- 5根据中文完成下列句子。小题1:我校有两百个学生。There are __1__ __2__ __3__ in my
- 6Mr. Smith doesn’t like all that empty talk between Susan and
- 7一种面粉的质量标识为“25±0.25千克”,则下列面粉中合格的[ ]A.24.70千克B.25.30千克C.24
- 8某中学同学为向全世界人民展现北京悠久沧桑的历史文化和充满魅力的现代气息,组织了一个大型图片展览,题为“首都北京的过去、现
- 9Their house is _______ ours, but ours has a bigger garden.A.
- 10将低倍物镜换成高倍物镜时,一个视野内[ ]A.细胞数目增多,体积变大,视野变暗B.细胞数目减少,体积变小,视野变