满分5 >
高中数学试题 >
若α∈[0,2π],且,则α的取值范围是( ) A. B. C. D.
若α∈[0,2π],且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877007_ST/0.png)
,则α的取值范围是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877007_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877007_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877007_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877007_ST/4.png)
考点分析:
相关试题推荐
设a=sin14°+cos14°,b=sin16°+cos16°,c=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877006_ST/0.png)
,则a、b、c的大小关系是( )
A.a<b<c
B.a<c<b
C.b<c<a
D.b<a<c
查看答案
在△ABC中,已知2sinAcosB=sinC,那么△ABC一定是( )
A.直角三角形
B.等腰三角形
C.等腰直角三角形
D.正三角形
查看答案
已知sina=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877004_ST/0.png)
,则cos(π-2a)=( )
A.-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877004_ST/1.png)
B.-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877004_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877004_ST/3.png)
D.
查看答案
设向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877003_ST/0.png)
=(1.cosθ)与
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877003_ST/1.png)
=(-1,2cosθ)垂直,则cos2θ等于 ( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877003_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877003_ST/3.png)
C.0
D.-1
查看答案
若f(tanx)=sin2x,则f(-1)的值是( )
A.-sin2
B.-1
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124117571487747/SYS201310251241175714877002_ST/0.png)
D.1
查看答案