# Finding Tangent 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 tangent of the specified radian argument with the help of Tan() 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 Tan() function.

Syntax:

`func Tan(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 tangent of the given radian argument`` ` `package main`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Finding the tangent``    ``// of the given value``    ``// Using Tan() function``    ``res_1 := math.Tan(math.Pi / 4)``    ``res_2 := math.Tan(math.Inf(-3))``    ``res_3 := math.Tan(0)``    ``res_4 := math.Tan(math.NaN())``    ``res_5 := math.Tan(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: 1.0
Result 2: NaN
Result 3: 0.0
Result 4: NaN
Result 5: -0.0
```

Example 2:

 `// Golang program to illustrate how to find``// the tangent of the given radian argument`` ` `package main`` ` `import (``    ``"fmt"``    ``"math"``)`` ` `// Main function``func main() {`` ` `    ``// Finding tangent ``    ``// of the given number``    ``nvalue_1 := math.Tan(math.Pi / 3)``    ``nvalue_2 := math.Tan(math.Pi / 6)`` ` `    ``// Sum of the given values``    ``res := nvalue_1 + nvalue_2`` ` `    ``// Displaying results``    ``fmt.Printf(``"%.1f + %.1f = %.1f"``, ``            ``nvalue_1, nvalue_2, res)`` ` `}`

Output:

`1.7 + 0.6 = 2.3`

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