Coordinate plane is a plane which has two axes and four quadrants. Horizontal number lines are along x – axis and vertical number lines are along y – axis. In Coordinate Plane center Point is known as origin. Its coordinate value is (0, 0). Now let's have a look on History of Coordinate Plane. Concept of Coordinate plane was given by French mathematician, philosopher and scientist “Rene Descartes”, he was a very strong thinker. Rene Descartes gave the concept of analytic Geometry and Cartesian coordinates and Cartesian curve. Coordinate plane was first invented in 1637 by Descartes and Pierre de Fermat. Fermat also worked on three dimensions but he did not publish his discovery. Both authors used single axis. Invention of coordinate plane system plays an important in development of Calculus that was given by Isaac Newton and Gottfried Wilhelm Leibniz. Since times of Descartes many different coordinate system has been invented such as polar coordinate that was given for plane, spherical and cylindrical coordinate that was given for three dimensional space.
Figure of coordinate plane is shown below:
In above figure we can see that there are four quadrants and two axes. x – axis is plotted along horizontal line and y – axis is plotted along vertical line. As we know that in first quadrant value of all Trigonometric Functions is positive. In case of second quadrant only sin function is positive rest all are negative. In third quadrant tan function is positive and rest of the values is negative. In last or fourth quadrant cos is positive and rest are negative. In coordinate plane positive values are plotted along right and upper side of origin and negative values are plotted along left side and lower side of origin point. This is all about the history of coordinate plane.