Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 7 - Analytic Trigonometry - 7.6 Double-angle and Half-angle Formulas - 7.6 Assess Your Understanding - Page 497: 3



Work Step by Step

Recall the Half-angle Identity for $\tan$: $\tan{\frac{\theta}{2}}=\frac{sin{\theta}}{1+\cos{\theta}}$. Hence the answer is: $\sin{(\theta)}.$
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