Answer
$a\approx4.58$
$A\approx66.4^\circ$
$B\approx23.6^\circ$
Work Step by Step
1. $a=\sqrt {5^2-2^2}=\sqrt {21}\approx4.58$
2. $A=cos^{-1}(\frac{2}{5})\approx66.4^\circ$
3. $B\approx(90-66.4)=23.6^\circ$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 7 - Applications of Trigonometric Functions - Chapter Review - Review Exercises - Page 578: 7
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