## Trigonometry 7th Edition

$\pi+\frac{\pi}{6}$
We know that $\frac{7\pi}{6}=\pi+\frac{\pi}{6}$, because $\pi+\frac{\pi}{6}=(1+\frac{1}{6})\pi=(\frac{7}{6})\pi=\frac{7\pi}{6}$.