Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 11 - Test - Page 535: 10a

Answer

True

Work Step by Step

$Cosβ=\frac{Adjacent side of \angleβ}{Hypotenuse}=\frac{a}{c}$ $Sinα=\frac{Opposite side of \angleα}{Hypotenuse}=\frac{a}{c}$ Thus, They both are equal. $Cosβ=Sinα$
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