TAN Trigonometric Tangent Function

Section: Mathematical Functions

Usage

Computes the tan function for its argument. The general syntax for its use is 
  y = tan(x)

where x is an n-dimensional array of numerical type. Integer types are promoted to the double type prior to calculation of the tan function. Output y is of the same size and type as the input x, (unless x is an integer, in which case y is a double type).

Function Internals

Mathematically, the tan function is defined for all real valued arguments x by the infinite summation

or alternately by the ratio

For complex valued arguments z, the tangent is computed via

Example

The following piece of code plots the real-valued tan(x) function over the interval [-1,1]: 
--> t = linspace(-1,1);
--> plot(t,tan(t))