求y=tan(3/pai-2x)的减区间?
问题描述:
求y=tan(3/pai-2x)的减区间?
答
kπ-π/2≤3/π-2x≤kπ+π/2
kπ-π/2-3/π≤-2x≤kπ+π/2+3/π
-kπ/2-π/4-3/2π≤x≤-kπ/2+π/4+3/2π