Trigonometry (11th Edition) Clone

Published by Pearson
ISBN 10: 978-0-13-421743-7
ISBN 13: 978-0-13421-743-7

Chapter 2 - Acute Angles and Right Triangles - Section 2.4 Solving Right Triangles - 2.4 Exercises - Page 79: 49


26. 92 inches

Work Step by Step

1. Split an isosceles triangle into two equal right triangles, with angle $38.12^{\circ}$ and adjacent side $21.18 in$ (halved base of the isosceles triangle ) 2. To find x (hypotenuse) use definition of trig function cosine $\cos 38.12^{\circ} = \frac{21.18}{x}$ $x\approx 26.92$ [4 significant figures as it is in a given adjacent side]
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