Consider the function f(x)=1−tan(x)1+tan(x)f(x) = \frac{1-\tan(x)}{1+\tan(x)}f(x)=1+tan(x)1−tan(x). For which value of x∈[0,π]x \in [0, \pi]x∈[0,π] is f(x)=13f(x) = \frac{1}{\sqrt{3}}f(x)=31?
π/12\pi/12π/12
π/6\pi/6π/6
π/4\pi/4π/4
π/3\pi/3π/3