# Asin

## Syntax

The syntax for the Asin function in Power Fx is as follows:

``` Asin(number) ```

The only argument required in the Asin function is the number for which you want to calculate the arcsine. This number must be between -1 and 1, inclusive.

## Example

Here is an example of how you can use the Asin function in Power Fx:

Suppose you want to calculate the arcsine of the number 0.5. Here is the Power Fx formula you can use:

``` Asin(0.5) ```

The result of this formula would be 0.5236 radians, which is equivalent to 30 degrees.

## Applications

The Asin function can be useful in various applications in Power Apps. For example, you can use this function to calculate the angle of a triangle if you know the lengths of its sides.

Suppose you have a right triangle with the sides a = 3 and b = 4. To calculate the angle A opposite to the side a, you can use the Asin function as follows:

``` Asin(3/5) ```

The result of this formula would be 0.6435 radians, which is equivalent to approximately 36.87 degrees.

The Power Fx Asin function can be a valuable tool in performing trigonometric calculations in Power Apps. This function can be used to calculate angles in degrees or radians, and it can be applied in various applications such as calculating the angle of a triangle. Remember to use this function only for numbers between -1 and 1, inclusive, and keep in mind that the result will always be in radians.