210
CHAPTER 25
25.18
25.19
25.20
25.21
25.22
25.23
25.24
25.25
25.26
25.27
(Here, we used the identity 2 cos « sin u = sin 2w.)
with an obvious interpretation in terms of average values.
Note that L'Hopital's rule did not apply. Use of the rule in this case would have led to
an incorrect answer.
to which L'Hopital's rule applies.
Thus,
Hence,
Then
CHAPTER 25
25.18
25.19
25.20
25.21
25.22
25.23
25.24
25.25
25.26
25.27
(Here, we used the identity 2 cos « sin u = sin 2w.)
with an obvious interpretation in terms of average values.
Note that L'Hopital's rule did not apply. Use of the rule in this case would have led to
an incorrect answer.
to which L'Hopital's rule applies.
Thus,
Hence,
Then