Chapter 4 - Section 4.1 - Angles and Radian Measure - Exercise Set - Page 532: 48

Quadrant I

$\frac{-7\pi}{4}$ radians It is a negative angle and obtained by rotating the terminal side clockwise $\frac{7\pi}{4}$ = $2\pi$ - $\frac{\pi}{4}$ radians. We use |$\frac{-7\pi}{4}$| or $\frac{7\pi}{4}$ to determine the rotation. So $\frac{-7\pi}{4}$ radians lies in quadrant I. Find the attachment.