atan()

Returns the arctangent (inverse tangent) of the given value in radians.

Syntax

atan(value)

Parameters

Parameter	Type	Description
value	Number	A number to compute arctangent.

Return Value

The arctangent of the given value in radians.

Examples

atan(0);     // returns 0

atan(1);     // returns pi()/4

atan(-1);    // returns -pi()/4

See also

pi
sin
asin
cos
acos
tan
atan
atan2
rad2deg
deg2rad