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Mathematics
Mathematics
Problem
Consider
f
:
[
0
,
2
π
]
→
[
−
1
,
1
]
f\!:\![0,2\pi]\;\to[-1,1]
f
:
[
0
,
2
π
]
→
[
−
1
,
1
]
given by
f
(
x
)
=
cos
x
f(x)=\cos x
f
(
x
)
=
cos
x
. Which of the following is correct?
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