গো Atan2 গণিত

package main
import (
  "fmt"
  "math"
)

func main() {

    fmt.Println(math.Atan2(0.5, 0.4))
    fmt.Println(math.Atan2(0.5, 0.5))
    fmt.Println(math.Atan2(0.5, 0.6))

}