Left: a Cartesian coordinate system. Right: direction angles of in Cartesian coordinates. |

History

The idea of this system was developed in 1637 by mathematician and philosopher René Descartes in his

In part two of his

Thermodynamics

The Cartesian coordinate system is often a starting point in the derivation of the science of thermodynamics, particulary in the 1850s derivations of German physicist Rudolf Clausius, in relation to a force acting on an infinitesimally small body, at a give point “●”

“Ever body, whether solid or fluid, is augmented in all its dimensions by any increase of its sensible heat.”

In particular, these types of calculations are facilitated via a vector analysis. For a vector in a plane, it is convenient to measure direction in terms of the angle, measured counterclockwise,

References

1. (a) Daintith, John. (2005).

(b) Maxwell, James C. (1878). “

2. "analytic geometry". Encyclopædia Britannica (Encyclopædia Britannica Online). (2008).

3. Descartes, R.

4. Clausius, Rudolf. (1879).

6. Boerhaave, Herman. (1724).