已知函数f(x)=4cosx*sin(x+π/6)-1

问题描述:

已知函数f(x)=4cosx*sin(x+π/6)-1
1.求f(x)的最小正周期
2.求f(x)在区间[-π/6,π/4]上的最大值和最小值

f(x)=4cosx*sin(x+π/6)-1=4cosx(sinx*√3/2+cosx*1/2)-1=2√3sinxcosx+2(cosx)^2-1=√3sin2x+cos2x=2sin(2x+π/6)1.求f(x)的最小正周期 T =π2.x∈[-π/6,π/4]则2x+π/6∈[-π/6,2π/3]最大值:y=2sin(π/2)=2最...