Atan()
function is used to find the inverse of a tan in Go language. The inverse of a tan is also known as arctan. Atan()
function is a part of math
library of Go programming language.
Syntax of Atan()
in Go Language
The syntax of Atan()
function is:
func Atan(x float64) float64
Note: float64
is a data type in go language which has IEEE-754 64-bit floating-point numbers.
Special cases are:
Atan(±0) = ±0
Atan(±Inf) = ±Pi/2
Parameters of Atan()
Function in Go Language
x
Any Valid GoLang number ( positive or negative ). This parameter is required.Note: if the
x
parameter is not a number, Atan()
function will return an error
.
Atan()
Return Value
Atan()
function returns a floating point number ( a value of the inverse of tan in radians ).
GoLang Atan()
Function Example 1:
package main import "fmt" import "math" func main() { var x float64 x = math.Atan(-1) fmt.Println(x) }
Output
-0.7853981633974483
GoLang Atan()
Function Example 2:
package main import "fmt" import "math" func main() { var x float64 x = math.Atan(0) fmt.Println(x) }
Output:
0
GoLang Atan()
Function Example 3:
package main import "fmt" import "math" func main() { var x float64 x = math.Atan(2) fmt.Println(x) }
Output:
1.1071487177940904