Answer
x = 60
Work Step by Step
Use the Cosine rule for the right triangle: $\frac{adjacent}{hypotenuse}$
cos(x) = $\frac{5}{10}$
SImplify the above equation:
x = 60 degrees
Since cosine of 60 degrees is half:
x =60 degrees
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 10 - Radical Expressions and Equations - 10-6 Trigonometric Ratios - Practice and Problem-Solving Exercises - Page 638: 31
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