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# What is the Asin function in Golang?

Faraz Karim

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The Asin function in the Go programming language is used to find the inverse of the sine value of a number:

Asin stands for arcsine, the actual name for the inverse of the sine value for any number.

To use this function, you must import the math package in your file and access the Asin function within it using the . notation (math.Asin). Here, Asin is the actual function, while math is the Go package that stores the definition of this function.

## Function definition

The definition of the Asin function inside the math package is:

## Parameters

The Asin function takes a single argument of type float64. This argument represents the angle whose sine inverse value you want to find. The value can range from -1 to 1 (both inclusive).

## Return value

The Asin function returns a single value of type float64. This value represents the sine inverse value of the argument and is in radians.

If the argument passed to the function is less than -1 or greater than 1, then the Asin function returns NAN.

## Example

The following is a simple example in which we find out the sine inverse value (in radians) of 0.25:

package mainimport ("fmt"		"math")func main() {	x := 0.25	y := math.Asin(x)	fmt.Print(y)}

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Faraz Karim 