Answer
The calculator is in Radian Mode
Work Step by Step
The calculator is in Radian Mode. For the calculator to properly display $\sin$ 30$^{\circ}$ as 0.5 it must be set in Degree Mode.
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 2 - Acute Angles and Right Triangles - Section 2.3 Finding Trigonometric Function Values Using a Calculator - 2.3 Exercises - Page 64: 35
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