Mathematics

Problem

Which interval of

\theta

describes all points that satisfy

y\ge x\ge 0

in the Cartesian plane? a)

0\le \theta \le \dfrac{\pi}{4}

\dfrac{\pi}{4}\le \theta \le \dfrac{\pi}{2}

\dfrac{\pi}{4}\le \theta \le \dfrac{3\pi}{4}

0\le \theta \le \dfrac{\pi}{2}