Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 3 - Section 3.2 - Radians and Degrees - 3.2 Problem Set - Page 133: 75


$\frac{\sqrt 3}{2}$

Work Step by Step

We know, $\sin(\frac{\pi}{2}+x)$ = $\cos x$ Given that x = $\frac{\pi}{6}$ Then, $\sin(\frac{\pi}{6}+\frac{\pi}{2})$ = $\cos \frac{\pi}{6}$ = $\frac{\sqrt 3}{2}$
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