Acronym of PCS

( Polar Coordinate System ) Device polar coordinates, a coordinate system two-dimensional in which the location of each point, its distance to the center of coordinates (r) and the angle between the line drawn from the center to that point and the axis length, (θ) is determined. This device in three dimensions to the coordinate system and cylindrical coordinate system, spherical turns.

the first use, similar to that to create a current, this device has been lost by aboureihan was done.

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