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Additional
unit circle
English Wikipedia - The Free Encyclopedia
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Unit circle
In
mathematics
, a
unit circle
is a
circle
with a
radius
of
one
. Frequently, especially in
trigonometry
, the unit circle is the circle of radius one centered at the origin (0, 0) in the
Cartesian coordinate system
in the
Euclidean plane
. The unit circle is often denoted
S
1
; the generalization to higher dimensions is the
unit sphere
.
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