Examples of elementary functions include the following: {| class="wikitable" |- | || a constant function |- | || a power function |- | || a root function |- | || a polynomial function |- | || a rational function |- | || a trigonometric function |- | || an inverse trigonometric function |- | || a logarithmic function (specifically, the natural logarithm) |- | || an exponential function |- | || an elementary function combining several of the above types of functions |}