Tangent (in French: Tangente) is one of the trigonometric proportions. < < - > the diagram of the tangent function is as follows. This function: - not continuous. - is alternating (with periodic ). - has infinite vertical asymptotes.

in the charts that The Shape of a function's show, the slope graph(or a line tangent to the graph) at any point is equal to The angle at which the line tangent to that point of the curve, with the positive direction of the horizontal axis(the X-axis) makes.