Atan()

The Atan() function returns the arctangent, in radians, of a given value.

Syntax

result := math.Atan(x)

Notes on .Atan():

• x is the value whose arctangent value is to be found.
• The result will be between between -π/2 to π/2 radians.
• If the argument is NaN it returns NaN.
• The value returned will be of type float64.

Example

The following code calculates the arctangent and prints out the result:

package main

import (
  "fmt"
  "math"
)

func main() {
  fmt.Println(math.Atan(33))
  fmt.Println(math.Atan(math.NaN()))
}

The output will be:

1.5405025668761214
NaN