# Secant Function

## Function

`sec(θ)`

## Summary

Given the angle of a right triangle as input, returns the ratio of the hypotenuse over the adjacent side. The secant function is the inverse of the cosine function.

## Input

Name | Description |
---|---|

θ | The symbol θ (theta) is a number representing the angle of a right triangle. |

## Output

Returns the ratio of the right triangle's adjacent side over its hypotenuse.

## Good Links

Angle | concept

Radians | concept

Right Triangle | concept