函数f(x)=sinx-cos(x+派/6)的值域为()
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函数f(x)=sinx-cos(x+派/6)的值域为()
函数f(x)=sinx-cos(x+派/6)的值域为()
函数f(x)=sinx-cos(x+派/6)的值域为()
f(x)=sinx-cosxcos(π/6)+sinxsin(π/6)
=(3/2)sinx-(√3/2)cosx
=√[(3/2)²+(√3/2)²]sin(x+α)
=√3sin(x+α)
其中sinα=(√3/2)/√3=1/2
cosα=(3/2)/√3=√3/2
所以α=π/6
所以f(x)=√3sin(x+π/6)
值域为[-√3,√3]