题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063826-51991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063827-43345.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063827-48814.png)
解析
试题分析:当
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063826-51991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063827-20967.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063827-96114.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063827-60989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063828-54169.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063828-43679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923063828-72972.png)
核心考点
试题【若,则可化简为 .】;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/20190923/20190923062123-66539.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923062123-70178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923053017-30384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923053017-62020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923051033-31265.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923051033-57886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923051034-98750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923051034-46538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923051034-79734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050907-87057.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050908-83140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050908-85359.png)
(2)已知
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050908-99512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050908-62593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050909-24954.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050748-69933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050748-48547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050748-24993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050749-65370.png)
(1)求角
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050749-96243.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050749-53852.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050749-98141.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190923/20190923050750-17840.png)
最新试题
- 1“汉朝早期,统治者试图在周朝松散的政治联盟和秦朝严格的中央专制间走一条中间路线。”材料中的“中间路线”是指A.郡国并行制
- 2若,则______________
- 3— Can I have myself examined first, Doctor? — Sorry! It"s no
- 4小星家的太阳能热水器,水箱容积是200L。小星进行了一次观察活动:某天早上,他用温度计测得自来水的温度为20℃,然后给热
- 5Which sign can you probably see in the supermarket?A.B.C.D.
- 6如图,反比例函数y=2x的图象与一次函数y=kx+b的图象交于点A(m,2),点B(-2,n),一次函数图象与y轴的交点
- 7一个物体若不受外力作用,则它将[ ]A、一定处于静止 B、一定处于匀速直线运动状态 C、可能做变速直线运动 D、
- 8下列用来表示物质变化的化学用语中,正确的是 (
- 9一个三角形的两边长为3和6,第三边的边长是方程(x-2)(x-4)=0的根,则这个三角形的周长是( )A.11B.11
- 10已知函数f(x)=x2+4x,x≥0x2-4x,x<0,若f(2a+1)>f(a),则实数a的取值范围是( )A.(-
热门考点
- 1若a>0,|a|=______;若a<0,|a|=______;若a=0,|a|=______.
- 2某待测液中可能含有Ag+、Al3+、K+、Ba2+,NH4+,NO3-.进行如下实验:①加入足量的盐酸,有白色沉淀生成,
- 3美国“海狼”潜艇上的核反应堆内使用了液体铝钠合金作载热介质,有关说法不正确的是( )A.合金的熔点一般比组分金属低B.
- 4下列省区中,既是我国四大牧区之一,又是我国重要甜菜产区的是[ ]A.青海B.新疆C.西藏D.黑龙江
- 5下列各项不属于反射的是[ ]A.食虫鸟见到某些昆虫的幼虫不敢食B.熟睡的人被蚊虫叮咬会动一动C.精彩的哑剧表演引
- 6如图是硝酸钾和氯化钠的溶解曲线图,根据图象回答:(1)t°C,KNO3的溶解度 (填“>”“等于”或“<”)Na
- 7化简: (1)-(+4); (2)+(+ ); (3) -(-3); (4)-[-(+4
- 8分解因式:3x2y+12xy2+12y3= .
- 9计算:x3•(2x3)2÷(x4)2=______.
- 10△ABC的一个内角的大小是40°,且∠A=∠B,那么∠C的外角的大小是( )A.140°B.80°或100°C.100