函数y=log(1/3)[sin(π/4-π/3)]的单调递增区间是( ),求详解,

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函数y=log(1/3)[sin(π/4-π/3)]的单调递增区间是( ),求详解,
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函数y=log(1/3)[sin(π/4-π/3)]的单调递增区间是( ),求详解,
函数y=log(1/3)[sin(π/4-π/3)]的单调递增区间是( ),求详解,

函数y=log(1/3)[sin(π/4-π/3)]的单调递增区间是( ),求详解,

题目不全,请核对题目后追问.(缺少自变量x)