ATAN

Returns an angle, in radians, with a tangent of the specified angle. The result is between -pi/2 and +pi/2.

Syntax

ATAN(Value)

Value is a number or a formula that returns a number.

Example

This example returns 0.7854 (pi/4 or 45 degrees):

ATAN(1)

This example returns 0:

ATAN(0)