Answer
$\frac{1}{cot^2x+1}=cos^2x$
Work Step by Step
$\frac{1}{cot^2x+1}=\frac{1}{csc^2x}=\frac{1}{\frac{1}{cos^2x}}=1·\frac{cos^2x}{1}=cos^2x$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 7 - Review Exercises - Page 552: 7
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