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ATAN Function

Last modified: June 17, 2011

Applies to: Office 2013 | Visio 2013

Returns the arctangent of a number, for example, the angle whose tangent is number. The resulting angle is in the range -PI/2 <= angle <= PI/2 radians (-90 <= angle <= 90 degrees).

ATAN(number)

Parameters

Name

Required/Optional

Data Type

Description

number

Required

Numeric

The tangent of the angle.

ATAN(1)

Returns 45 deg

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