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:
1 | 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:
1 2 3 4 5 6 7 8 9 10 | 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:
1 2 3 4 5 6 7 8 9 10 | 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:
1 2 3 4 5 6 7 8 | package main import "fmt" import "math" func main() { var x float64 x = math.Atan(2) fmt.Println(x) } |
Output:
1.1071487177940904
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