Answer
$2800\ lb$
Work Step by Step
Following Example-10 with the formula $F=W\ sin\theta$. We have $-145=W\ sin(-3^\circ)$, thus $W=\frac{-145}{sin(-3^\circ)}\approx2800\ lb$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 5 - Trigonometric Functions - 5.3 Trigonometric Functions - 5.3 Exercises - Page 534: 140
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