Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 1 - Section 1.1 - Angles, Degrees, and Special Triangles - 1.1 Problem Set - Page 11: 24


No, We could not answer Problem 23 in such case.

Work Step by Step

If we did not know that the vertical posts were perpendicular to the horizontal, we would not be able to conclude that sum of α and β is $90^{\circ}$ as we can not establish that triangle ABC formed by producing line along vertical post to the horizontal is right triangle thus we could not answer Problem 23 in such case.
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