Answer
$\sec(y)=\frac{1}{x}$
Work Step by Step
From the given triangle, $\cos (y)=\frac{adjacent}{hypotenuse}$
adjacent$=x$, hypotenuse$=1$
Therefore $\cos (y)=\frac{x}{1}=x$
$\sec(y)=\frac{1}{\cos (y)}$
Therefore $\sec(y)=\frac{1}{x}$
Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 5 - Logarithmic, Exponential, and Other Transcendental Functions - 5.6 Exercises - Page 372: 19
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