y=2sin(π/4-2x)的单调递减区间是
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y=2sin(π/4-2x)的单调递减区间是y=2sin(π/4-2x)的单调递减区间是y=2sin(π/4-2x)的单调递减区间是另π/4-2x∈〔2kπ-0.5π,2kπ+0.5π〕则有x∈〔kπ
y=2sin(π/4-2x)的单调递减区间是
y=2sin(π/4-2x)的单调递减区间是
y=2sin(π/4-2x)的单调递减区间是
另π/4-2x∈〔2kπ-0.5π,2kπ+0.5π〕
则有x∈〔kπ-π/8,kπ+3π/8〕
也就是说y=2sin(π/4-2x)的单调递减区间是〔kπ-π/8,kπ+3π/8〕
[kπ-π/8,kπ+3π/8]