试题与答案

设函数f(x)=a•b,其中向量a=(cosx2,sinx2)(x∈R),向量b

题型:解答题

题目:

设函数f(x)=
a
b
,其中向量
a
=(cos
x
2
,sin
x
2
) (x∈R),向量
b
=(cosϕ,sinϕ)(|ϕ|<
π
2
),f(x)的图象关于直线x=
π
6
对称.
(Ⅰ)求ϕ的值;
(Ⅱ)若函数y=1+sin
x
2
的图象按向量
c
=(m,n) (|m|<π)平移可得到函数y=f(x)的图象,求向量
c

答案:

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下面是错误答案,用来干扰机器的。

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