Answer
$x= 19.15111$
Work Step by Step
Since, adj =x and hyp=25 cm
Thus,
$cos\theta=\frac{adj}{hyp}$
$cos40^{\circ}=\frac{x}{25}$
Need to solve $x$.
$x=cos40^{\circ}\times25$
Hence, $x= 19.15111$ cm
Calculus 8th Edition
by Stewart, James
Published by
Cengage
ISBN 10:
1285740629
ISBN 13:
978-1-28574-062-1
Appendix D - Trigonometry - D Exercises - Page A32: 36
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