Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 13, Trigonometric Ratios and Functions - 13.2 Define General Angles and Use Radian Measure - Guided Practice for Example 3 - Page 861: 8


18 degrees

Work Step by Step

We know that there are 180 degrees per pi radians. Thus, we find: $$=\frac{\pi}{10} \ radians \times \frac{180^{\circ}}{\pi\ radians}=18^{\circ}$$
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