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热心网友
(1)
f(x)=A*B=cos(2x-θ)
f(π/6)=cos(π/3-θ)=1
又0<θ<π
θ=π/3
f(x)=cos(2x-π/3)
f(x)的最小正周期是T=2π/2=π
(2)
cos(2x-π/3)∈[-1/2,1]
f(x)的最大值是1,最小值是-1/2