题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004515-73775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004516-77219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004516-12067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004516-38781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004515-73775.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004516-56218.png)
A.10 | B.![]() | C.20 | D.![]() |
答案
解析
试题分析:由余弦定理得
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004517-27349.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004517-90351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004518-47391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004518-26649.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004503-33428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004503-38118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004504-61692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004504-33140.png)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004504-46514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004504-98317.png)
(Ⅱ)从圆
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004503-38118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004505-26712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004505-26712.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004503-33428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004505-75458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004503-33428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004459-99801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004459-14749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004459-30693.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004452-52910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004453-72688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004453-60909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004453-78843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004454-15265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004454-96080.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004447-70100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004447-54907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004447-94732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004448-13021.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004448-45368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004448-38170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004448-57533.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004441-74517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004441-36391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004441-93725.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004441-58869.png)
(1)求角
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004442-95137.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004442-54065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004441-74517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020004442-64881.png)
最新试题
- 1We all dream about things that we would like to do and thing
- 211.(6分)一辆汽车由静止开始做匀加速直线运动,加速度大小为2 m/s2,则汽车在第2秒末的速度大小为________
- 3关于父母是否应当支付子女上大学的费用问题,有以下两种观点。甲:父母应当支付子女上大学的费用乙:父母不应当支付子女上大学的
- 4如图,能由△ABC 平移得到的小三角形共有______个.
- 5下列高原中,以高山气候为主的是( )A.伊朗高原B.蒙古高原C.德干高原D.青藏高原
- 61934年,在美国一家咖啡馆里,四位老朋友的谈话中,能反应当年社会实际情况的是[ ]A.威廉:我不能把现金存入任
- 7给加点字注音,根据拼音写汉字。(4分) A.诘( )难B.咬文嚼( )宇C.chī( )笑D.kè( )尽职守
- 8方程2x+x-4=0的实数根所在的区间为( )A.(0,2)B.(1,2)C.(2,3)D.(3,4)
- 9阅读下列材料材料一:据估计,被劫掠和破坏的财产,总值超过六百万镑。在场的每个军人都掠夺很多。在进入皇宫的宫殿后,谁也不知
- 10如图,扇形OAB,∠AOB=90,⊙P 与OA、OB分别相切于点F、E,并且与弧AB切于点C,则扇形OAB的面积与⊙P的
热门考点
- 1有关我国民族的叙述,正确的是A.我国是一个统一的多民族国家,共有55个民族B.少数民族多分布在东南、东北、西北地区C.汉
- 2下列说法正确的是A.在实验室里,可用丁达尔效应区别硫酸钠溶液和淀粉溶液B.由于2NO+2CO2CO2+N2的ΔH<0,则
- 3.Over 800 pages of the earliest surviving Christian Bible ha
- 4某氧化物X难溶于水,能与烧碱反应,生成易溶于水的化合物Y,将少量Y溶液滴入盐酸中无沉淀生成,则X是 ( )
- 5先化简,再求值:(a2b+2ab2-b3)÷b-(a-b)(a+b),其中a=12,b=-6.
- 6下列反应的离子方程式正确的是A.FeCl3溶液腐蚀铜板电路:Fe3+ +Cu = Fe2+ + Cu2+B.碳酸钙溶于醋
- 7下列变化属于物理变化的是……( ) A.用热碱液洗涤器皿上的油污 B.加热胆矾成白色无水硫酸铜 C.漂白的草帽久置空气中
- 8小军同学用下列四种方法测定小球沿桌面滚动时的平均速度,其中你认为最好的是( )A.先选定一段较长的路程,测定小球通过这
- 9如图,两矩形ABCD,ABEF所在平面互相垂直,DE与平面ABCD及平面ABEF所成角分别为,M、N分别为DE与DB的中
- 10—_____ yellow shoes are these?—They are my shoes. [ ]A.