# ACOS

Spread for WinForms provides advanced software components that support Excel import/export, full cell customization, an extensive calculation engine with over 450 functions and more, all with zero dependencies on Excel.

## Content



This function calculates the arccosine, that is, the angle whose cosine is the specified value.

## Syntax

ACOS(*value*)

## Arguments

For the argument, you can specify the cosine of the angle you want to return, which must be a value between –1 and 1.

## Remarks

The result angle is in radians between 0 (zero) and PI (pi). If you want to convert the result to degrees, multiply the result by 180/PI.

## Data Types

Accepts numeric data. Returns numeric data.

## Examples

`ACOS(B3)`
`ACOS(R3C2)`
`ACOS(0.5)` gives the result 1.0471975512

## Version Available

This function is available in product version 1.0 or later.

## See Also

[ACOSH](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsAtoC/FunctionACOSH) \| [ASIN](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsAtoC/FunctionASIN) \| [COS](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsAtoC/FunctionCOS) \| [COSH](/spreadnet/docs/latest/online-formula/formulas-functionsall/formulas-functsAtoC/FunctionCOSH) \| [Math and Trigonometry Functions](/spreadnet/docs/latest/online-formula/formulas-overview/formulas-functs/formulas-functtypes/formulas-functsmathtrig)