Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 10 - Radical Expressions and Equations - 10-6 Trigonometric Ratios - Lesson Check - Page 637: 2



Work Step by Step

Recall, for a right triangle, cos B equals the length of the side adjacent to angle B divided by the length of the hypotenuse of the triangle. When we do this for the triangle in the problem, we find that cos B equals 6/10, which reduces to $3/5$.
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