SEC Trigonometric Secant Function

Section: Mathematical Functions

Usage

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

where x is an n-dimensional array of numerical type. Integer types are promoted to the double type prior to calculation of the sec 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 sec function is defined for all arguments as

Example

The following piece of code plots the real-valued sec(2 pi x) function over the interval of [-1,1]: 
--> t = linspace(-1,1,1000);
--> plot(t,sec(2*pi*t))
--> axis([-1,1,-10,10]);