Answer
$2\pi-\frac{\pi}{6}$
Work Step by Step
We know that $\frac{11\pi}{6}=2\pi-\frac{\pi}{6}$, because $2\pi-\frac{\pi}{6}=(2-\frac{1}{6})\pi=(\frac{11}{6})\pi=\frac{11\pi}{6}$.
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