Answer
$OQ = \frac{1}{2}$
Work Step by Step
Let $x = OQ$:
$\frac{x}{r} = cos ~60^{\circ}$
$\frac{x}{r} = \frac{1}{2}$
$x = (r)~(\frac{1}{2})$
$x = (1)~(\frac{1}{2})$
$x = \frac{1}{2}$
$OQ = \frac{1}{2}$
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 3 - Radian Measure and the Unit Circle - Section 3.3 The Unit Circle and Circular Functions - 3.3 Exercises - Page 120: 87a
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