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Problem
Problem
Let
f
(
x
)
=
sin
x
−
x
f(x) = \sin x - x
f
(
x
)
=
sin
x
−
x
on
[
0
,
π
/
2
]
[0, \pi/2]
[
0
,
π
/2
]
, find local maximum and local minimum.
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