Answer
$y = 2x^2 -1$
Work Step by Step
$x = \cos{t} \hspace{30pt} y = \cos{2t} $
$x^2 = \cos^2{t} \hspace{30pt} y^ 2 \cos^2 {t} - 1$
$y = 2x^2 -1$
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 7 - Section 7.4 - The Area of a Triangle - 7.4 Problem Set - Page 397: 40
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