That is because - for example - some calculations are easier in polar coordinates, and some are easier in rectangular coordinates. For example, complex numbers are easier to add and subtract in rectangular coordinates, and easier to multiply and divide in polar coordinates.
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There are slight differences between a coordinate and and ordinate. In mathematics, an ordinate is plotted on the vertical axis of a two dimensional system and is an element of an ordered pair. A coordinate however, refers to a geometry system which uses one or more than one number to chart and determine the position of a point or other geometic element.
Yes, almost all the time. And when it is not coordinate planes it is coordinate hype-spaces (more than just the 2 dimensions that the coordinate plane allows).
Points located in the first quadrant of a Cartesian coordinate system have both coordinates ('x' and 'y') positive, i.e. equal to or greater than zero.
First, a coordinate. A coordinate is a number. It labels a point on a line.Second, a coordinate axis is a line with coordinates.to label a point in a plane (a flat surface), we need more than one coordinate axis, and we place a second at right angles to the first.Those axes are called rectangular coordinate axes, because they are at right angles to one another. The coordinates on them are called rectangular coordinates. They are also called Cartesian coordinates.
It means that the y-coordinate (or any coordinate other than the x-coordinate) is non-zero.