已知函数f(x)=2cosxsin(x+π/3)-根号3sin^2x+sinxcosx 当x∈[0,π/4]时,f(x)的值域_数学解答

已知函数f(x)=2cosxsin(x+π/3)-根号3sin^2x+sinxcosx 当x∈[0,π/4]时,f(x)的值域

人气：235 ℃　时间：2019-08-20 05:41:36

解答

f(x)=2cosxsin(x+π/3)-√3*(sinx)^2+sinxcosx=2cosx[sinxcos(π/3)+cosxsin(π/3)]-√3*(sinx)^2+sinxcosx=sinxcosx+√3*(cosx)^2-√3*(sinx)^2+sinxcosx=2sinxcosx+√3*[(cosx)^2-(sinx)^2]=sin2x+√3*cos2x=2sin(...