设函数f(x)=sinx+sin(x+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124305645010133/SYS201310251243056450101015_ST/0.png)
).
(Ⅰ)求f(x)的最小值,并求使f(x)取得最小值的x的集合;
(Ⅱ)不画图,说明函数y=f(x)的图象可由y=sinx的图象经过怎样的变化得到.
考点分析:
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如图,正方体ABCD-A
1B
1C
1D
1的棱长为1,P为BC的中点,Q为线段CC
1上的动点,过点A,P,Q的平面截该正方体所得的截面记为S,则下列命题正确的是
(写出所有正确命题的编号).
①当0<CQ<
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时,S为四边形
②当CQ=
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时,S为等腰梯形
③当CQ=
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时,S与C
1D
1的交点R满足C
1R=
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④当
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<CQ<1时,S为六边形
⑤当CQ=1时,S的面积为
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|=3|
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|=|
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+2
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与
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)+
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的定义域为
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