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Mathematics
Mathematics
Problem
Show that the graph of
f
(
x
)
=
sin
x
−
cos
x
f(x) = \sin x - \cos x
f
(
x
)
=
sin
x
−
cos
x
has a local maximum point at
(
3
π
4
,
2
)
(\frac{3\pi}{4}, \sqrt{2})
(
4
3
π
,
2
)
.
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