函数y=-tan(x/3-π/6)的单调区间函数y=-tan(x/3-π/6)的单调区间
函数y=-tan(x/3-π/6)的单调区间只有减区间kπ-π/2即kπ-π/3∴ 3kπ-π即函数y=-tan(x/3-π/6)的单调减区间 (3kπ-π,3kπ+2π),k∈Z