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Mathematics
Mathematics
Problem
The principal value of
arccos
x
\arccos x
arccos
x
always lies in the interval a)
(
0
,
π
)
(0,\pi)
(
0
,
π
)
b)
[
0
,
2
π
]
[0,2\pi]
[
0
,
2
π
]
c)
[
0
,
π
]
[0,\pi]
[
0
,
π
]
d)
[
−
π
2
,
π
2
]
\left[-\dfrac{\pi}{2},\dfrac{\pi}{2}\right]
[
−
2
π
,
2
π
]
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