Answer
$r'(t)=\frac{1}{\sqrt{1-x^2}}i-\frac{1}{\sqrt{1-x^2}}j$
Work Step by Step
$$\boxed{\textbf{Please see attached image.}}$$
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 12 - Vector-Valued Functions - 12.2 Exercises - Page 830: 20
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