求函数f(x)=[sin(3x-π/6)]/[sin(2π/3-3x)]的定义域和单调区间
问题描述:
求函数f(x)=[sin(3x-π/6)]/[sin(2π/3-3x)]的定义域和单调区间
答
化简得f(x)=[sin(3x-π/6)]/[cos(π/2-(2π/3-3x))]=tan(3x-π/6),那么定义域为:(π/9+2kπ,2π/9+2kπ)
k为正整数,单调区间即为定义域