函数y=cos(x-π/6)(x∈[π/6,2π/3]的最小值.

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函数y=cos(x-π/6)(x∈[π/6,2π/3]的最小值.函数y=cos(x-π/6)(x∈[π/6,2π/3]的最小值.函数y=cos(x-π/6)(x∈[π/6,2π/3]的最小值.∈[π/

函数y=cos(x-π/6)(x∈[π/6,2π/3]的最小值.
函数y=cos(x-π/6)(x∈[π/6,2π/3]的最小值.

函数y=cos(x-π/6)(x∈[π/6,2π/3]的最小值.
∈[π/6,2π/3],x-π/6在第一象限余弦值为正,当X=2π/3时x-π/6=2π/3-π/6=π/2,y=cos(x-π/6)=cosπ/2=0最小值为0

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