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Unit Circle - Sin and Cos
In trigonometry, a
unit circle
is the circle of
radius
one centered at the origin
$(0, 0)$ in the Cartesian coordinate system. Let a
line
through the
origin,
making an
angle,
of $\theta$=
with the positive half of the x-axis, intersect the
unit circle.
The
x-coordinates
and
y-coordinates
of this point of intersection are equal to
$\cos(\theta)$
and
$\sin(\theta)$,
respectively.
See Wikipedia.
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Last updated August 24th, 2021