Answer
Quadrant II
Work Step by Step
$\frac{3\pi}{4}$ radians
It is a positive angle and obtained by rotating the terminal side counterclockwise $\frac{3\pi}{4}$ = $\frac{\pi}{2}$ + $\frac{\pi}{4}$ radians.
So $\frac{3\pi}{4}$ radians lie in quadrant II.
Find the attachment.