A point on the unit circle has x-coordinate and lies above the x-axis

MATHEMATICS · Subjective · AP · AP Precalculus · Trigonometric and Polar Functions · Trigonometric and Polar Functions

Problem

A point on the unit circle has x-coordinate

-\dfrac{1}{2}

and lies above the x-axis. (i) Determine its y-coordinate. (ii) State the corresponding angle

\theta

(in degrees) between

0^{\circ}

and

360^{\circ}