Answer
5/13
Work Step by Step
Remember, for a right triangle, cos F is equal to side adjacent to angle f divided by the hypotenuse of the triangle. When we do this for the triangle in the problem, we find that cos f equals 5/13.
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 10 - Radical Expressions and Equations - 10-6 Trigonometric Ratios - Practice and Problem-Solving Exercises - Page 649: 9
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