2022-12-30
展开全部
值域[-1/2,1/2]
对称轴x/3-π/4=π/2+kπ
x=9π/4+3kπ
对称中心x/3-π/4=kπ
(3π/4+3kπ,0)
单调增区间,-π/2+kπ≤x/3-π/4≤π/2+kπ
-π3/4+3kπ≤x≤9π/4+3kπ
[-3π/4+3kπ,9π/4+3kπ]
单调减区间,π/2+kπ≤x/3-π/4≤3π/2+kπ
9π/4+3kπ≤x≤21π/4+3kπ
[9π/4+3kπ,21π/4+3kπ]
对称轴x/3-π/4=π/2+kπ
x=9π/4+3kπ
对称中心x/3-π/4=kπ
(3π/4+3kπ,0)
单调增区间,-π/2+kπ≤x/3-π/4≤π/2+kπ
-π3/4+3kπ≤x≤9π/4+3kπ
[-3π/4+3kπ,9π/4+3kπ]
单调减区间,π/2+kπ≤x/3-π/4≤3π/2+kπ
9π/4+3kπ≤x≤21π/4+3kπ
[9π/4+3kπ,21π/4+3kπ]
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