Chapter 4 - Section 4.1 - Angles and Radian Measure - Exercise Set - Page 532: 46

Quadrant III

$\frac{-5\pi}{6}$ radians It is a negative angle and obtained by rotating the terminal side clockwise $\frac{5\pi}{6}$ = $\pi$ - $\frac{\pi}{6}$ radians. We use |$\frac{-5\pi}{6}$| or $\frac{5\pi}{6}$ to determine the rotation. So $\frac{5\pi}{6}$ radians lies in quadrant III. Find the attachment.