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 main

import ("fmt"
		"math")

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

What is the Asin function in Golang?

Used in Go to compute an angle's arcsine, the Asin function returns a float64 value in radians.