已知函数f(x)=cos
2x-sin
2x+2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225403915746833/SYS201311012254039157468016_ST/0.png)
sonxcosx+1.
(1)求f(x)的最小正周期,并求f(x)的最小值;
(2)若f(a)=2,且a∈[
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225403915746833/SYS201311012254039157468016_ST/1.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225403915746833/SYS201311012254039157468016_ST/2.png)
],求a的值.
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225403915746833/SYS201311012254039157468015_ST/1.png)
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