ATAN

Returns the arctangent, or inverse tangent, of the specified number. The arctangent is the angle whose tangent is the specified number. The returned angle is given in radians in the range [-π/2…π/2].

Syntax

ATAN( Number n ) → Number

Parameters

n

Required. A number representing a tangent.

Remarks

To express the arctangent in degrees, multiply the result by 180/PI or use the DEGREES function.

Example

Formula

=ATAN(1)
=ATAN(1)*180/PI()

See Also

Function Reference
ATAN2 Function
TAN Function
PI Function
RADIANS Function
DEGREES Function