Mathematics

Problem

\cot \theta + \cot\left(\frac{\pi}{4} + \theta\right) = 2

, then the general value of

\theta

is a.

2n\pi \pm \frac{\pi}{6}

2n\pi \pm \frac{\pi}{3}

n\pi \pm \frac{\pi}{3}

n\pi \pm \frac{\pi}{6}