22. (2023春•简阳市校级期中)已知函数f(x)=3cos(2x−π3)−2sinxcosxf(x)=\sqrt{3}\cos ({2x-\frac{\pi }{3}})-2\sin x\cos xf(x)=3cos(2x−3π)−2sinxcosx.(1)求f(x)f(x)f(x)的最小正周期;(2)求当x∈[−π4,π4]x\in [{-\frac{\pi }{4},\frac{\pi }{4}}]x∈[−4π,4π]时,f(x)f(x)f(x)的值域.