T=π/w=2
∴w=π/2
f(x)=tan(πx/2+π/3)
定义域:πx/2+π/3≠kπ+π/2
即:x≠2k+1/3 k∈Z
tanx的单调递增区间:
(kπ-π/2,kπ+π/2)
f(x)的单调递增区间:
kπ-π/2