已知函数f(x)=
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(Ⅰ)把f(x)解析式化为f(x)=Asin(ωx+ϕ)+b的形式,并用五点法作出函数f(x)在一个周期上的简图;
(Ⅱ)计算f(1)+f(2)+…+f(2012)的值.
考点分析:
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=(x,3).
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已知函数f(x)=sin(2x-
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)+2,求:
(Ⅰ)函数f(x)的最小正周期和最大值;(Ⅱ)函数f(x)的单调递增区间.
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定义平面向量之间的一种运算“⊗”如下,对任意的
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230148687163033/SYS201311012301486871630015_ST/0.png)
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=mq-np,给出下面五个判断:
①若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230148687163033/SYS201311012301486871630015_ST/4.png)
与
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共线,则
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⊗
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=0;
②若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230148687163033/SYS201311012301486871630015_ST/8.png)
与
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垂直,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101230148687163033/SYS201311012301486871630015_ST/10.png)
⊗
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=0;
③
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⊗
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=
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⊗
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;
④对任意的λ∈R,有
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;
⑤(
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⊗
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)
2+
2=|
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|
2|
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|
2其中正确的有
(请把正确的序号都写出).
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(平面向量)已知|
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|=|
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|=|
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|=1,则|
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+
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|的值为
.
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cos43°cos77°+sin43°cos167°的值为
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