## 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]);