Answer
3
Work Step by Step
Given expression
= $ ( 2 \cos 30^{\circ})^{2}$
=$ ( 2 \times \frac{\sqrt 3}{2})^{2}$
( substituting exact value of $\cos 30^{\circ}$)
= $(\sqrt 3)^{2}$
= 3
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 2 - Section 2.1 - Definition II: Right Triangle Trigonometry - 2.1 Problem Set - Page 62: 37
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