高一数学函数题,要过程,谢谢
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∵f(x)=sinxsin(x π/2)-√3cos??(3π x) √3/2
=sinxcosx-√3cos??x √3/2
=(1/2)sin2x-(√3/2)cos2x
=sin(2x-π/3)
(1)∴T=2π/2=π
(2)令2x-π/3=2kπ-π/2,解得x=kπ-π/12,k∈Z
令2x-π/3=2kπ π/2,解得x=kπ 5π/12,k∈Z
∴f(x)的单调递增区间为x∈[kπ-π/12,kπ 5π/12],k∈Z
(3)令2x-π/3=kπ π/2,解得x=kπ/2 5π/12
∴f(x)的对称轴方程为x=kπ/2 5π/12,k∈Z
令2x-π/3=kπ,解得x=kπ/2 π/6
∴f(x)的对称中心坐标为(kπ/2 π/6,0),k∈Z
=sinxcosx-√3cos??x √3/2
=(1/2)sin2x-(√3/2)cos2x
=sin(2x-π/3)
(1)∴T=2π/2=π
(2)令2x-π/3=2kπ-π/2,解得x=kπ-π/12,k∈Z
令2x-π/3=2kπ π/2,解得x=kπ 5π/12,k∈Z
∴f(x)的单调递增区间为x∈[kπ-π/12,kπ 5π/12],k∈Z
(3)令2x-π/3=kπ π/2,解得x=kπ/2 5π/12
∴f(x)的对称轴方程为x=kπ/2 5π/12,k∈Z
令2x-π/3=kπ,解得x=kπ/2 π/6
∴f(x)的对称中心坐标为(kπ/2 π/6,0),k∈Z
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