---
title: "cos(_:)"
framework: Spatial
role: symbol
role_heading: Function
platforms: [iOS 17.0+, iPadOS 17.0+, Mac Catalyst 17.0+, macOS 14.0+, tvOS 17.0+, watchOS 10.0+]
path: "spatial/cos(_:)-609v4"
---

# cos(_:)

## Declaration

```swift
func cos(_ angle: Angle2D) -> Double
```

## See Also

### Applying trigonometric functions

- [cos(_:)](spatial/cos(_:)-79fxe.md)
- [cosh(_:)](spatial/cosh(_:)-6cg6v.md)
- [cosh(_:)](spatial/cosh(_:)-9mmhn.md)
- [sin(_:)](spatial/sin(_:)-46su7.md)
- [sin(_:)](spatial/sin(_:)-5tddt.md)
- [sinh(_:)](spatial/sinh(_:)-4m7ds.md)
- [sinh(_:)](spatial/sinh(_:)-8kigy.md)
- [tan(_:)](spatial/tan(_:)-1sjgu.md)
- [tan(_:)](spatial/tan(_:)-9x99s.md)
- [tanh(_:)](spatial/tanh(_:)-1f341.md)
- [tanh(_:)](spatial/tanh(_:)-5yozs.md)