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polar angle

noun, Mathematics
1.
See under polar coordinates.

polar coordinates

noun, Mathematics
1.
a system of coordinates for locating a point in a plane by the length of its radius vector and the angle this vector makes with the polar axis (polar angle)
Origin
1810-1820
1810-20
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for polar-angle

polar coordinates

plural noun
1.
a pair of coordinates for locating a point in a plane by means of the length of a radius vector, r, which pivots about the origin to establish the angle, θ, that the position of the point makes with a fixed line. Usually written (r, θ) See also Cartesian coordinates, spherical coordinates
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for polar-angle

polar coordinates

system of locating points in a plane with reference to a fixed point (origin) and an axis through that point. The coordinates are written (r,theta), in which r is the distance from the origin to any desired point and theta is the angle made by the vector r and the axis. A simple relationship exists between Cartesian coordinates given in terms of two reference axes (x,y) and the polar coordinates (r,theta), namely: x = r cos theta, and y = r sin theta

Learn more about polar coordinates with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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