# Arc Sine Function

## Function

`arcsin(x)`

## Summary

Given a number representing the the ratio of a right triangle's opposite side over its hypotenuse returns the corresponding angle.

## Input

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

x | A number from -1 to 1 representing the ratio of the opposite side over the hypotenuse. |

## Output

Returns the angle corresponding to the ratio.

## Good Links

Angle | concept

Radians | concept

Right Triangle | concept

Sine | function