Definition:Polar Axis
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Definition
Polar Coordinates
Let $O$ be the pole of the polar coordinate plane.
A ray is drawn from $O$, usually to the right, and referred to as the polar axis.
Spherical Coordinates
Definition:Spherical Coordinates/Polar Axis
Also known as
Some sources refer to the polar axis as the initial line.
Some use the term initial vector.
Also see
- Results about polar axes can be found here.