求函数f(x)=sin(x+π/3)+2sin(x-π/3)的最大值和最小值 明白,立刻就给分.我着急要.所以以最快的为标准
问题描述:
求函数f(x)=sin(x+π/3)+2sin(x-π/3)的最大值和最小值 明白,立刻就给分.我着急要.所以以最快的为标准
答
f(x)=sin(x+π/3)+2sin(x-π/3)=sinxcosπ/3+cosxsinπ/3+2sinxcosπ/3-2cosxsinπ/3=3/2*sinx-√3/2*cosx=√3(sinx*√3/2-cosx*1/2)=√3(sinxcosπ/6-cosxsinπ/6)=√3sin(x-π/6)所以最大值=√3,最小值=-√3...