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Mathematics
Mathematics
Problem
Let
r
=
2
+
2
sin
θ
r=2+2\sin\theta
r
=
2
+
2
sin
θ
. Determine all values of
θ
\theta
θ
in the interval
0
≤
θ
<
2
π
0\le\theta<2\pi
0
≤
θ
<
2
π
at which the curve has a horizontal tangent line.
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