【紧急】若f(x)=sin(x+θ)+根号3cos(x+θ)为偶函数,则tanθ还有一问:若f(x)=sin(x+θ)+根号3cos(x-θ)为偶函数,则tanθ

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【紧急】若f(x)=sin(x+θ)+根号3cos(x+θ)为偶函数,则tanθ还有一问:若f(x)=sin(x+θ)+根号3cos(x-θ)为偶函数,则tanθ

【紧急】若f(x)=sin(x+θ)+根号3cos(x+θ)为偶函数,则tanθ还有一问:若f(x)=sin(x+θ)+根号3cos(x-θ)为偶函数,则tanθ
【紧急】若f(x)=sin(x+θ)+根号3cos(x+θ)为偶函数,则tanθ
还有一问:若f(x)=sin(x+θ)+根号3cos(x-θ)为偶函数,则tanθ

【紧急】若f(x)=sin(x+θ)+根号3cos(x+θ)为偶函数,则tanθ还有一问:若f(x)=sin(x+θ)+根号3cos(x-θ)为偶函数,则tanθ
f(x)=sin(x+θ)+√3cos(x+θ)=2[1/2sin(x+θ)+√3/2cos(x+θ)]=2sin(x+θ+π/3)
为偶函数 θ+π/3=π/2 θ=π/6 tanθ=tanπ/6=√3/3