Which interval of describes all points that satisfy in the Cartesian plane?

MATHEMATICS · Single correct · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

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}

(b)

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

(c)

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

(d)

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