# GoLang – Find Sine – Sin() Function – Examples & Explanation

`Sin()` function is used to find the sine of the given radian input (`x` – parameter) in Go language. The standard math package of Go programming language has `Sin()` function.

## Syntax of `Sin()` Function in Go Language

The syntax of `Sin()` function in Go Language is:

```func Sin(x float64) float64
```

Note: `float64` is a data type in Go language which has IEEE-754 64-bit floating-point numbers.
Special cases are:
```Sin(±0) = ±0 Sin(±Inf) = NaN Sin(NaN) = NaN```

## Parameters of `Sin()` Function in Go Language

`x ` – Where `x` is any Valid `float64` Input value in radians. This parameter is required.

## Error Handling

If the `x ` parameter is not a number (numeric value) `Sin()` function returns an `error `.
If there is no argument (`x` – input value) passes to the function, then the compiler will produce an `error`.

## Return Value of `Sin()` Function in Go Language

`Sin()` function will return the sine of the given input(`x ` – parameter).

## GoLang `Sin()` Function Example 1

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Sin(-3.79)
fmt.Println(x)
}
```

Output:
` 0.6039177530112606`

## GoLang `Sin()` Function Example 2

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Sin(12.6)
fmt.Println(x)
}
```

Output:
` 0.03362304722113669`

## GoLang `Sin() ` Function Example 3

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Sin(9)
fmt.Println(x)
}
```

Output:
` 0.4121184852417566`