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cos() : Cosine Function

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Summary

Calculate the cosine of an angle (in radians).

Signature 

cos(angleInRadians)

Parameters

Parameter Type Required Description
angleInRadians Number Yes The angle in radians

Returns

Type: Double

The cosine of the angle (value between -1 and 1).

Examples

Basic Cosine 

<p>cos(0) = </p>
<p>cos(π) = </p>

Output:

<p>cos(0) = 1.000</p>
<p>cos(π) = -1.000</p>

Convert Degrees to Radians 

<p>cos(0°) = </p>
<p>cos(60°) = </p>
<p>cos(90°) = </p>

Output:

<p>cos(0°) = 1.000</p>
<p>cos(60°) = 0.500</p>
<p>cos(90°) = 0.000</p>

Calculate Position 

<p>X = </p>

Data:

doc.Params["model"] = new {
    radius = 10,
    angle = Math.PI / 3  // 60 degrees
};

Output:

<p>X = 5.00</p>

Notes

  • Input must be in radians (not degrees)
  • Returns value between -1 and 1
  • For degrees, use: cos(radians(degrees))
  • Common values:
    • cos(0) = 1
    • cos(π/3) = 0.5
    • cos(π/2) = 0
    • cos(π) = -1

See Also