已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/0.png)
=(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/1.png)
sin
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/2.png)
,1),
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/3.png)
=(cos
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/4.png)
,cos
2![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/5.png)
),f(x)=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/6.png)
•
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/7.png)
.
(1)若f(x)=1,求cos(x+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/8.png)
)的值;
(2)在△ABC中,角A,B,C的对边分别是a,b,c且满足acosC+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490016_ST/9.png)
c=b,求函数f(B)的取值范围.
考点分析:
相关试题推荐
为了了解某市工厂开展群众体育活动的情况,拟采用分层抽样的方法从A、B、C三个区中抽取6个工厂进行调查.已知A、B、C区中分别有18,27,9个工厂.
(1)求从A、B、C区中应分别抽取的工厂个数;
(2)若从抽得的6个工厂中随机地抽取2个进行调查结果的对比,求这2个工厂中至少有1个来自A区的概率.
查看答案
设两个向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490014_ST/0.png)
=(λ+2,λ
2-cox
2α)和
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490014_ST/1.png)
=(m,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490014_ST/2.png)
+sinα),其中λ,m,α为实数.若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490014_ST/3.png)
=2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490014_ST/4.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123950694749098/SYS201310251239506947490014_ST/5.png)
的取值范围是
.
查看答案
已知函数f(x)=|x-3|-2|x-1|,则其最大值为
.
查看答案
在正方体ABCD-A
1B
1C
1D
1中,M、N、P、Q分别是AB、AA
1、C
1D
1、CC
1的中点,给出以下四个结论:①AC
1⊥MN; ②AC
1∥平面MNPQ; ③AC
1与PM相交; ④NC
1与PM异面.其中正确结论的序号是
.
查看答案
某程序的框图如图所示,若执行该程序,则输出的i值为
.
查看答案