acos() : Arccosine (Inverse Cosine)
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Summary
Calculate the arccosine (inverse cosine) of a value, returning the angle in radians.
Signature
acos(value)
Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
value |
Number | Yes | Value between -1 and 1 |
Returns
Type: Double
The angle in radians (between 0 and π).
Examples
Basic Arccosine
Output:
<p>acos(0.5) = 1.047 radians</p>
<p>acos(0.5) = 60.0°</p>
Find Angle from Adjacent Side
Data:
doc.Params["model"] = new {
adjacent = 8.66,
hypotenuse = 10
};
Output:
<p>Angle: 30.0°</p>
Notes
- Value must be between -1 and 1
- Returns angle in radians
- Result range: 0 to π
- Inverse of
cos()function - For degrees, use:
degrees(acos(value))