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# How to Find the Sin and Cos Value of a Number in Golang?

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 can find the value of sin and cos of the specified number with the help of Sincos() 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 Sincos() function.

Syntax:

`func Sincos(a float64) (sin, cos float64)`
• If you pass -Inf or +Inf in this function like Sincos(-Inf) or Sincos(+Inf), then this function will return NaN, NaN.
• If you pass -0 or +0 in this function like Sincos(-0) or Sincos(+0), then this function will return -0 or +0, 1.
• If you pass NaN in this function like Sincos(NaN), then this function will return NaN, NaN.

Example 1:

 `// Golang program to illustrate the Sincos() Function`` ` `package main`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Using Sincos() function``    ``res_1, res_2 := math.Sincos(math.Pi / 3)``    ``res_3, res_4 := math.Sincos(0)``    ``res_5, res_6 := math.Sincos(math.Inf(-1))``    ``res_7, res_8 := math.Sincos(math.NaN())``    ``res_9, res_10 := math.Sincos(math.Pi)`` ` `    ``// Displaying the result``    ``fmt.Printf(``"Result 1: %.1f, %.1f"``, res_1, res_2)``    ``fmt.Printf(``"\nResult 2: %.1f, %.1f"``, res_3, res_4)``    ``fmt.Printf(``"\nResult 3: %.1f, %.1f"``, res_5, res_6)``    ``fmt.Printf(``"\nResult 4: %.1f, %.1f"``, res_7, res_8)``    ``fmt.Printf(``"\nResult 5: %.1f, %.1f"``, res_9, res_10)`` ` `}`

Output:

```Result 1: 0.9, 0.5
Result 2: 0.0, 1.0
Result 3: NaN, NaN
Result 4: NaN, NaN
Result 5: 0.0, -1.0
```

Example 2:

 `// Golang program to illustrate the Sincos() Function`` ` `package main`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Using Sincos() function``    ``nvalue_1, nvalue_2 := math.Sincos(math.Pi / 2)``    ``nvalue_3, nvalue_4 := math.Sincos(math.Pi / 3)`` ` `    ``// Sum of the given sin values``    ``res1 := nvalue_1 + nvalue_3``    ``fmt.Println(``"Sum of Sin Values:"``)``    ``fmt.Printf(``"%.2f + %.2f = %.2f\n"``, ``            ``nvalue_1, nvalue_3, res1)`` ` `    ``// Sum of the given cos values``    ``res2 := nvalue_2 + nvalue_4``    ``fmt.Println(``"Sum of Cos Values:"``)``    ``fmt.Printf(``"%.2f + %.2f = %.2f"``, ``           ``nvalue_2, nvalue_4, res2)`` ` `}`

Output:

```Sum of Sin Values:
1.00 + 0.87 = 1.87
Sum of Cos Values:
0.00 + 0.50 = 0.50
```

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