题目内容
将函数![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_ST/0.png)
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_ST/1.png)
A.g(x)=sin2x+1
B.g(x)=cos2x+1
C.
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_ST/2.png)
D.g(x)=sin2x-1
【答案】分析:利用向量平移的法则,将函数
的图象按向量
平移即可得到函数g(x)的图象.
解答:解:∵f(x)=sin(2x+
)
g(x)=sin[2(x-
)+
]+1=1+sin2x.
故选A.
点评:本题考查函数y=Asin(ωx+φ)的图象变换,关键在于掌握“图象按向量
平移”的意义:就是右移
后再上移1个单位,属于中档题.
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_DA/0.png)
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_DA/1.png)
解答:解:∵f(x)=sin(2x+
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_DA/2.png)
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_DA/3.png)
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_DA/4.png)
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_DA/5.png)
故选A.
点评:本题考查函数y=Asin(ωx+φ)的图象变换,关键在于掌握“图象按向量
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_DA/6.png)
![](http://thumb.zyjl.cn/pic6/res/gzsx/web/STSource/20131024185631898249797/SYS201310241856318982497006_DA/7.png)
![](http://thumb.zyjl.cn/images/loading.gif)
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