已知扇形的半径为2,圆心角是
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361015_ST/0.png)
弧度,则该扇形的面积是
.
考点分析:
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定义行列式运算:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361014_ST/0.png)
,将函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361014_ST/1.png)
向左平移m个单位(m>0),所得图象对应的函数为偶函数,则m的最小值是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361014_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361014_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361014_ST/4.png)
D.
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函数y=sinπx(x∈R)的部分图象如图所示,设O为坐标原点,P是图象的最高点,B是图象与x轴的交点,则tan∠OPB=( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361013_ST/images0.png)
A.10
B.8
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361013_ST/0.png)
D.
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对于函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361012_ST/0.png)
,则下列结论正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361012_ST/1.png)
的图象关于点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361012_ST/2.png)
对称
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361012_ST/3.png)
在区间
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361012_ST/4.png)
递增
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361012_ST/5.png)
的图象关于直线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361012_ST/6.png)
对称
D.最小正周期是
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已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361011_ST/0.png)
满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361011_ST/1.png)
,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361011_ST/2.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361011_ST/3.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361011_ST/4.png)
等于( )
A.4
B.8
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361011_ST/5.png)
D.
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将函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361010_ST/0.png)
的图象先向左平移
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231153644536107/SYS201311012311536445361010_ST/1.png)
,然后将所得图象上所有的点的横坐标变为原来的2倍(纵坐标不变),则所得到的图象对应的函数解析式为( )
A.y=-cos
B.y=sin4
C.y=sin
D.
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