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<h1 id="function-sec">Function sec <a href="#function-sec" title="Permalink">#</a></h1>

Calculate the secant of a value, defined as `sec(x) = 1/cos(x)`.

For matrices, the function is evaluated element wise.


<h2 id="syntax">Syntax <a href="#syntax" title="Permalink">#</a></h2>

```js
math.sec(x)
```

<h3 id="parameters">Parameters <a href="#parameters" title="Permalink">#</a></h3>

Parameter | Type | Description
--------- | ---- | -----------
`x` | number &#124; Complex &#124; Unit &#124; Array &#124; Matrix | Function input

<h3 id="returns">Returns <a href="#returns" title="Permalink">#</a></h3>

Type | Description
---- | -----------
number &#124; Complex &#124; Array &#124; Matrix | Secant of x


<h2 id="examples">Examples <a href="#examples" title="Permalink">#</a></h2>

```js
math.sec(2)      // returns number -2.4029979617223822
1 / math.cos(2)  // returns number -2.4029979617223822
```


<h2 id="see-also">See also <a href="#see-also" title="Permalink">#</a></h2>

[cos](cos.html),
[csc](csc.html),
[cot](cot.html)