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Lebl-Basic-Analysis-I
· Problem 4.1.6
The Derivative
Mathematics · differentiability-sine
Problem
Assume the inequality
∣
x
−
sin
(
x
)
∣
≤
x
2
|x - \sin(x)| \leq x^2
∣
x
−
sin
(
x
)
∣
≤
x
2
. Prove that
sin
\sin
sin
is differentiable at
0
0
0
, and find the derivative at
0
0
0
.
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