mathjs/docs/reference/functions/atan.md

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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 | Complex | Array | Matrix	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