Answer
$A =70^\circ$;
$b \approx3.42$;
$a \approx9.40$
Work Step by Step
Step 1. $A=90-B=90-20=70^\circ$
Step 2. $b=10sin20^\circ\approx3.42$;
Step 3. $a=10cos20^\circ\approx9.40$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 8 - Applications of Trigonometric Functions - Chapter Review - Review Exercises - Page 557: 6
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