2013年成人高考高升本《理科数学》模拟试卷(3)
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11、
已知角α的顶点与直角坐标系的原点重合始边在X正半轴上,终边经过点(
,一1),则sinα的值是( )
A.-1/2
B.![](//wximg.233.com/attached/image/20130829/20130829100792999299.jpg)
C.1/2
D.![](//wximg.233.com/attached/image/20130829/20130829100774037403.jpg)
12、![](//wximg.233.com/attached/image/20130829/20130829110053515351.jpg)
A.π/3
B.2π/3
C.3π/4
D.5π/6
13、
![](//wximg.233.com/attached/image/20130829/20130829113071877187.jpg)
A.16
B.20
C.18
D.不能确定
14、
函数Y=(COS2x-sin2x)·tan2x的小正周期是( )
A.π2
B.π
C.2π
D.4π
15、 函数Y=sin4x-cos4x的小正周期是( )
A.π
B.2π
C.![](//wximg.233.com/attached/image/20130828/20130828104798219821.jpg)
D.4π
16、![](//wximg.233.com/attached/image/20130828/20130828111754025402.jpg)
A.3/4
B.![](//wximg.233.com/attached/image/20130828/2013082811170853853.jpg)
C.![](//wximg.233.com/attached/image/20130828/20130828111864306430.jpg)
D.0
17、 已知a,b∈R+,且ab=a+b+3,则ab的取值范围是( )
A.ab≤9
B.ab≥9
C.3≤ab≤9
D.ab6≥3
已知角α的顶点与直角坐标系的原点重合始边在X正半轴上,终边经过点(
![](http://wximg.233.com/attached/image/20130829/20130829100738343834.jpg)
A.-1/2
B.
![](http://wximg.233.com/attached/image/20130829/20130829100792999299.jpg)
C.1/2
D.
![](http://wximg.233.com/attached/image/20130829/20130829100774037403.jpg)
12、
![](http://wximg.233.com/attached/image/20130829/20130829110053515351.jpg)
A.π/3
B.2π/3
C.3π/4
D.5π/6
13、
![](http://wximg.233.com/attached/image/20130829/20130829113071877187.jpg)
A.16
B.20
C.18
D.不能确定
14、
函数Y=(COS2x-sin2x)·tan2x的小正周期是( )
A.π2
B.π
C.2π
D.4π
15、 函数Y=sin4x-cos4x的小正周期是( )
A.π
B.2π
C.
![](http://wximg.233.com/attached/image/20130828/20130828104798219821.jpg)
D.4π
16、
![](http://wximg.233.com/attached/image/20130828/20130828111754025402.jpg)
A.3/4
B.
![](http://wximg.233.com/attached/image/20130828/2013082811170853853.jpg)
C.
![](http://wximg.233.com/attached/image/20130828/20130828111864306430.jpg)
D.0
17、 已知a,b∈R+,且ab=a+b+3,则ab的取值范围是( )
A.ab≤9
B.ab≥9
C.3≤ab≤9
D.ab6≥3