   Chapter 4.4, Problem 16E ### Single Variable Calculus: Early Tr...

8th Edition
James Stewart
ISBN: 9781305270343

#### Solutions

Chapter
Section ### Single Variable Calculus: Early Tr...

8th Edition
James Stewart
ISBN: 9781305270343
Textbook Problem

# Find the limit. Use l’Hospital’s Rule where appropriate. If there is a more elementary method, consider using it. If l’Hospital’s Rule doesn’t apply, explain why. lim x → 0 x 2 1 − cos x

To determine

To evaluate: The value of limx0x21cosx .

Explanation

Obtain the value of the function as x approaches 0 .

As x approaches 0 , the numerator is,

x2=02=0

As x approaches 0 , the denominator is,

1cosx=1cos0=11=0

Thus, limx0x21cosx=00 is in an indeterminate form.

Therefore, apply L’Hospital’s Rule and obtain the limit as shown below.

limx0x21cosx=limx02xsinx

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Study Guide for Stewart's Multivariable Calculus, 8th 