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Polar Coordinates
The origin or pole of polar coordinates called point O and a
horizontal half line with the endpoint O, called the polar axis,
is a nonnegative line which the length of a segment can be
measured. Angle q is the angle in
which the terminal side is rotated.
Point P has polar coordinates ( r,q
), r ³ 0, if q has
the polar axis as the initial side and point P is on the terminal
side of q and |OP| = r, the distance
from the origin to P is r.
Point P has polar coordinates ( r,q
), r < 0 if the terminal side of q
is extended | r | units to the other side of the origin to point
P. ( when r is negative)
ex.
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