(k∈Z)π/2×x+π/3≠kπ+π/2x≠2k+1/3kπ-π/2<π/2×x+π/32k-5/3定义域{x|x≠2k+1/3,k∈Z}周期π单调区间(2k-5/3,2k+1/3)
定义域 kπ-π/2<π/2×x+π/3 k-5/6T=π/(π/2)=2单调区间 kπ-π/2<π/2×x+π/3 k-5/6增区间( k-5/6，k+1/6 ) k∈Z
X不等于2k-1/3. 周期等于2 单调区间为2k-5/3
