Answer
$\frac{5}{4}$
Work Step by Step
Given expression-
= $ 5 (\sin 30^{\circ})^{2}$
= 5 $ (\frac{1}{2})^{2}$ [ substituting exact value of $ \sin 30^{\circ}$]
= $ 5 \times \frac{1}{4}$
= $\frac{5}{4}$
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: 36
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