UKismetMathLibrary::Cos
#include "Kismet/KismetMathLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintPure
Description
Returns the cosine of the given angle in radians. Use DegCos instead if your angle is already in degrees.
Caveats & Gotchas
- • Input must be in radians — a common mistake is passing degrees directly, which produces wrong results. Convert with DegreesToRadians first if needed.
- • Returns a double; if you assign to a float variable the compiler will silently narrow the precision, which can cause subtle drift in tight simulation loops.
Signature
static UE_INL_API double Cos(double A);Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| A | double | Angle in radians. | — |
Return Type
double Example
Compute horizontal component of a direction C++
float AngleRad = FMath::DegreesToRadians(45.f);
double CosVal = UKismetMathLibrary::Cos(AngleRad);
// CosVal ≈ 0.7071Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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