Applies ToSharePoint Server Subscription Edition SharePoint Server 2019 SharePoint Server 2016 SharePoint Server 2013 SharePoint Server 2013 Enterprise SharePoint in Microsoft 365 SharePoint Foundation 2010 SharePoint Server 2010 SharePoint in Microsoft 365 Small Business Windows SharePoint Services 3.0

Returns the arctangent, or inverse tangent, of a number. The arctangent is the angle whose tangent is number. The returned angle is given in radians in the range -pi/2 to pi/2.

Syntax

ATAN(number)

Number     is the tangent of the angle you want.

Remark

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

Examples

Formula

Description (Result)

=ATAN(1)

Arctangent of 1 in radians, pi/4 (0.785398)

=ATAN(1)*180/PI()

Arctangent of 1 in degrees (45)

=DEGREES(ATAN(1))

Arctangent of 1 in degrees (45)

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