Answer
Q
Work Step by Step
This problem has many parts but the motive is to reduce the theta part to somewhere between $[-2\pi,2\pi]$. To do this we can add or subtract $2\pi$ since that is a complete rotation. So here, $3\pi/4$ and 4. So $3\pi/4$ is on the segment QS since if we rotate $3\pi/4$ radians on the unit circle we get to the point Q. And 4 is positive so Q is the answer.