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Unit circle/Real/Definition
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Unit circle
The set
E
:=
{
(
x
,
y
)
∈
R
2
∣
x
2
+
y
2
=
1
}
{\displaystyle {}E:={\left\{(x,y)\in \mathbb {R} ^{2}\mid x^{2}+y^{2}=1\right\}}\,}
is called the
unit circle
.
