Tan is the short version of the trigonometry Tangent() function. This short version is always used in equations and expressions since it takes less space. Used in an equation it might look like

tan x = 3.22
This would be interpreted as "The tangent of x is 3.22". Most mathematicians would speak it as "tan x equals 3.22".

Pages referring to 'tan'

Interactive demonstration of the graph of the tangent function in trigonometry
Definition of the tangent function as applied to right triangles in trigonometry
Definition of the arctan function in trigonometry. The inverse of the tangent function. The angle whose tangent is a given number.
A brief introduction to trigonometry to allow geometry formulas to be calculated. How to claculate sin, cos, tan functions.