Answer
$b \approx8.34$, $c \approx9.14$, $A =40^\circ$.
Work Step by Step
Given $a=7, B=50^\circ$, we have $b=a\ tanB=7tan50^\circ\approx8.34$, $c=a\ secB=7sec50^\circ\approx9.14$, $A=90^\circ-B=40^\circ$.
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 - Section 7.1 Right Triangle Trigonometry ; Applications - 7.1 Assess Your Understanding - Page 540: 32
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