Applies ToSharePoint Server 订阅版 SharePoint Server 2019 SharePoint Server 2016 SharePoint Server 2013 SharePoint Server 2013 企业版 Microsoft 365 中的 SharePoint SharePoint Foundation 2010 SharePoint Server 2010 Microsoft 365 小型企业版中的 SharePoint Windows SharePoint Services 3.0

Returns the arccosine, or inverse cosine, of a number. The arccosine is the angle whose cosine is number. The returned angle is given in radians in the range 0 (zero) to pi.

Syntax

ACOS(number)

Number     is the cosine of the angle you want and must be from -1 to 1.

Remark

If you want to convert the result from radians to degrees, multiply it by 180/PI() or use the DEGREES function.

Examples

Formula

Description (Result)

=ACOS(-0.5)

Arccosine of -0.5 in radians, 2*pi/3 (2.094395)

=ACOS(-0.5)*180/PI()

Arccosine of -0.5 in degrees (120)

=DEGREES(ACOS(-0.5))

Arccosine of -0.5 in degrees (120)

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