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Mathematics
Mathematics
Problem
List the
x
x
x
‐coordinates of all points where
y
=
cos
x
y=\cos x
y
=
cos
x
attains the value
−
1
-1
−
1
in the domain
x
∈
[
−
2
π
,
2
π
]
x\in[-2\pi,\,2\pi]
x
∈
[
−
2
π
,
2
π
]
.
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