Atn(number)

Returns the arctangent of a number. The arctangent is the angle whose tangent is number.

See also Tan, Sin, Cos, and Pi.

number

Tangent of the angle you want.

Usage

The range of the result is -Pi/2 to Pi/2 radians. To convert degrees to radians, multiply degrees by Pi/180. To convert radians to degrees, multiply radians by 180/Pi.