The point corresponding to an angle on the unit circle has x–coordinate and lies in…

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

Problem

The point corresponding to an angle

θ

on the unit circle has x–coordinate

\dfrac{3}{5}

and

θ

lies in Quadrant IV. Find

\sin θ

. (a) -\dfrac{3}{5} (b) \dfrac{4}{5} (c) -\dfrac{4}{5} (d) -\dfrac{\sqrt{10}}{5}