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WorksheetFunction.Acos Method (Excel)

Returns the arccosine, or inverse cosine, of a number. The arccosine is the angle whose cosine is Arg1. The returned angle is given in radians in the range 0 (zero) to pi.

expression .Acos(Arg1)

expression A variable that represents a WorksheetFunction object.

Parameters

Name

Required/Optional

Data Type

Description

Arg1

Required

Double

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

Return Value

Double

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

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