Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 6 - The Circular Functions and Their Graphs - 6.1 Radian Measures - 6.1 Exercises - Page 573: 9


The angle is 1 radian.

Work Step by Step

The area of a sector is $A = 0.5 \times R^2 \times a$ where R is the radius, and a is the central angle in radians. lets use the equation: $8 = 0.5 \times 4^2 \times a$ $8 = 8 a$ $a = 1$
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