# Finding Sine Value of Specified Number in Golang

• Last Updated : 01 Apr, 2020

Go language provides inbuilt support for basic constants and mathematical functions to perform operations on the numbers with the help of the math package. You are allowed to find the sine of the specified radian argument with the help of Sin() function provided by the math package. So, you need to add a math package in your program with the help of the import keyword to access the Sin() function.

Syntax:

`func Sin(y float64) float64`
• If you pass +Inf or -Inf in this function, then this function will return NaN(not-a-number).
• If you pass NaN in this function, then this function will return NaN.
• If you pass 0 in this function, then this function will return 0.

Example 1:

 `// Golang program to illustrate how to find``// the sine of the given radian argument`` ` `package main`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Finding the sine``    ``// of the given value``    ``// Using Sin() function``    ``res_1 := math.Sin(math.Pi / 4)``    ``res_2 := math.Sin(math.Inf(-3))``    ``res_3 := math.Sin(0)``    ``res_4 := math.Sin(math.NaN())``    ``res_5 := math.Sin(math.Pi)`` ` `    ``// Displaying the result``    ``fmt.Printf(``"Result 1: %.1f"``, res_1)``    ``fmt.Printf(``"\nResult 2: %.1f"``, res_2)``    ``fmt.Printf(``"\nResult 3: %.1f"``, res_3)``    ``fmt.Printf(``"\nResult 4: %.1f"``, res_4)``    ``fmt.Printf(``"\nResult 5: %.1f"``, res_5)``}`

Output:

```Result 1: 0.7
Result 2: NaN
Result 3: 0.0
Result 4: NaN
Result 5: 0.0
```

Example 2:

 `// Golang program to illustrate how to find``// the sine of the given radian argument`` ` `package main`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Finding sine of the given number``    ``nvalue_1 := math.Sin(math.Pi / 3)``    ``nvalue_2 := math.Sin(math.Pi / 2)`` ` `    ``// Sum of the given values``    ``res := nvalue_1 + nvalue_2`` ` `    ``// Displaying results``    ``fmt.Printf(``"%.1f + %.1f = %.1f"``, ``           ``nvalue_1, nvalue_2, res)`` ` `}`

Output:

`0.9 + 1.0 = 1.9`

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