Chapter 8 - Complex Numbers, Polar Equations, and Parametric Equations - Section 8.5 Polar Equations and Graphs - 8.5 Exercises - Page 387: 1c

Since $r \gt 0$ and $\theta$ is an angle of $30^{\circ}$ below the positive x-axis, the point is in quadrant IV.

$(6,-30^{\circ})$ $r = 6$ and $\theta = -30^{\circ}$ Since $r \gt 0$ and $\theta$ is an angle of $30^{\circ}$ below the positive x-axis, the point is in quadrant IV.