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Mathematics
Mathematics
Problem
If the points
(
−
2
,
0
)
(-2,0)
(
−
2
,
0
)
,
(
−
1
,
1
3
)
\left(-1, \frac{1}{\sqrt{3}}\right)
(
−
1
,
3
1
)
and
(
cos
θ
,
sin
θ
)
(\cos \theta, \sin \theta)
(
cos
θ
,
sin
θ
)
are collinear, then the number of values of
θ
∈
[
0
,
2
π
]
\theta \in [0, 2\pi]
θ
∈
[
0
,
2
π
]
is
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