mathjs/docs/reference/functions/atan.md

Function atan

Calculate the inverse tangent of a value.

For matrices, the function is evaluated element wise.

Syntax

math.atan(x)

Parameters

Parameter	Type	Description
x	Number | BigNumber | Boolean | Complex | Array | Matrix | null	Function input

Returns

Type	Description
Number | BigNumber | Complex | Array | Matrix	The arc tangent of x

Examples

math.atan(0.5);           // returns Number 0.4636476090008061
math.atan(math.tan(1.5)); // returns Number 1.5

math.atan(2);             // returns Complex 1.5707963267948966 -1.3169578969248166 i

See also

tan, asin, acos