Answer
$2$
Work Step by Step
From problem 17 $\to \sin{\dfrac{A}{2}} = \dfrac{1}{2}$
$\because \csc{\dfrac{A}{2}} = \dfrac{1}{\sin{\dfrac{A}{2}}}$
$\csc{\dfrac{A}{2}} = 2$
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 5 - Section 5.4 - Half-Angle Formulas - 5.4 Problem Set - Page 304: 20
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