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Mathematics
Mathematics
Problem
Let
f
(
x
)
=
sin
x
x
f(x)=\dfrac{\sin x}{x}
f
(
x
)
=
x
sin
x
for
x
≠
0
x\neq0
x
=
0
. Find
f
′
(
π
)
f'(\pi)
f
′
(
π
)
. a)
−
π
-\pi
−
π
b)
1
π
\dfrac{1}{\pi}
π
1
c)
−
1
π
-\dfrac{1}{\pi}
−
π
1
d)
−
1
-1
−
1
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