题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082249-67761.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082249-30875.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082249-14154.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082250-51470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082250-64851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082250-39884.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082250-14467.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082250-21792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082251-69560.png)
解析
试题分析:(1)根据
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082251-92564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082251-40798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082251-68121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082252-68216.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082250-51470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082250-64851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082252-14829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082250-39884.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082252-82678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082252-91866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082252-58587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082253-66661.png)
试题分析:(1)∵
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082253-94051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082253-16639.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082253-24530.png)
(2)∵
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082254-41346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082254-15158.png)
又∵
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082254-59156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082254-32005.png)
而
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082250-39884.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082252-82678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082252-91866.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082252-58587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082253-66661.png)
核心考点
试题【已知函数(1)求的值;(2)设,,,,求的值.】;主要考察你对两角和与差的三角函数等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082244-37378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082245-92335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082245-27553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921082212-82188.png)
A.[-2,2] | B.[-![]() ![]() |
C.[-1,1] | D.[-![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921081732-95799.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921081436-41691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921081436-18211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921081436-29711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921081413-57753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921081414-18304.png)
最新试题
- 1阅读下面的文章,完成问题山间小路龙应台(1)我到长沙,什么都不想看,只想去看一条小路,也是一条山中小路。在那条小路上,朱
- 2如图是a、b两种固体物质的溶解度曲线,下列说法中,正确的是 ( )A.20°C时,a物质的溶解度是5B.在20℃时,
- 3如图是某地农业土地利用示意图。分析并回答问题:小题1:Y农业生产分布的边界范围与城市距离分别是A.20 km 60 km
- 4下列实验操作中错误的是 ( ) A.蒸发操作时,应使混合物中的水分完全蒸干后,才能停止加热B.蒸馏操作时,应使温度计
- 5The weather fine. [ ]A. remained
- 6下列疾病与缺乏某种元素无直接关系的是( )A.龋齿B.佝偻病C.甲状腺肿大D.近视
- 7用显微镜观察小鱼尾鳍内的血液流动现象时,在显微镜的视野看到了下图,请判断下列叙述正确的是[ ]A.①是静脉B.②
- 8《苟子。王制》指出:春耕、夏耘、秋收、冬藏,四者不失时,故五谷不绝,而百姓有余食也。这启示我们A.物质世界是绝对运动和相
- 9在玻片上写下数字69,用显微镜观察时,会看到放大的图形是A.69B.66C.96D.99
- 10A、B两辆汽车在平直的公路上同向行驶。当B车在A车前84 m处时,B车速度为4 m/s,且正以2 m/s2的加速度做匀加
热门考点
- 1下列有关人体的叙述中,错误的是( )A.刚出生婴儿接种的乙肝疫苗,从免疫角度说属于抗原B.毛细血管的管壁非常薄,便于血
- 2下列词语中,没有错别字的一项是( )A.震慑 紧箍咒 无瑕顾及 城门失火,殃及池鱼B.谜团 掉书袋 脍灸人口 为渊驱鱼
- 3 ⑴但是我没有摘。我没有摘花的习惯。我只是伫立凝望,觉得这一条紫藤萝瀑布不只在我眼前,也在我心上缓缓流过。流着流着,它
- 4下列变化不属于化学变化的是( )A.用液态空气制氧气B.加热氧化汞制氧气C.加热氯酸钾制氧气D.绿色植物光合作用
- 5Mrs White _______ dinner when her son came home. [ ]A. i
- 6 ______,王昭君嫁给了 __________,为汉匈友好作出了杰出的贡献。
- 7.I want to buy a rope which is _____________this one.A.twice
- 8阅读下列材料,结合所学知识回答问题:材料一:材料二:90年前爆发的五四运动,是以一批先进青年知识分子为先锋、广大人民群众
- 9由金红石(TiO2)制取单质Ti,涉及到的部分步骤为: 已知:① C(s)+O2(g)=CO2(g) DH1 ② 2CO
- 10近几年煤矿事故不断,这往往是由于企业不具备安全生产条件、加班加点等原因造成的。煤矿企业这样做,严重侵犯了矿工的[