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如图是函数y=sin(ωx+φ)的图象的一部分,A,B是图象上的一个最高点和一个...
如图是函数y=sin(ωx+φ)的图象的一部分,A,B是图象上的一个最高点和一个最低点,O为坐标原点,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955006_ST/0.png)
的值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955006_ST/images1.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955006_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955006_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955006_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955006_ST/4.png)
考点分析:
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若sin2x、sinx分别是sinθ与cosθ的等差中项和等比中项,则cos2x的值为:( )
A.
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B.
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C.
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已知各项均不为零的数列{a
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,
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,n∈N
*.下列命题中真命题是( )
A.若∀n∈N
*总有
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955004_ST/3.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955004_ST/5.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955004_ST/6.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955004_ST/8.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100658723395571/SYS201311031006587233955004_ST/9.png)
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