Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 8 - Application of Trigonometry - Summary Exercises on Applications of Trigonometry and Vectors - Exercises - Page 792: 8

Answer

$380\ mph, 64^\circ$

Work Step by Step

1. See diagram, the vector of the plane without wind is $355cos62^\circ i +355sin62^\circ j$ 2. The wind vector is $28.5 i$ 3. The resulting vector is $(355sins62^\circ+28.5) i +355cos62^\circ j\approx341.95i+166.66j$ 4. The ground speed is given by $v=\sqrt {(341.95)^2+(166.66)^2}\approx380\ mph$ 5. The bearing angle $\theta$ can be found as $theta=arctan(\frac{341.95}{166.66})\approx64^\circ$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.