---
title: "cospi(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/cospi(_:)-57353"
---

# cospi(_:)

Returns the cosine of each element in a vector multiplied by pi.

## Declaration

```swift
func cospi(_ x: simd_double2) -> simd_double2
```

## See Also

### Trigonometric Functions

- [acos(_:)](simd/acos(_:)-1hgv5.md)
- [asin(_:)](simd/asin(_:)-72orw.md)
- [atan(_:)](simd/atan(_:)-9onaa.md)
- [atan2(_:_:)](simd/atan2(_:_:)-6ogu4.md)
- [cos(_:)](simd/cos(_:)-3p9ym.md)
- [sin(_:)](simd/sin(_:)-3p88b.md)
- [sinpi(_:)](simd/sinpi(_:)-4lgpo.md)
- [sincos(_:)](simd/sincos(_:)-9pa2l.md)
- [sincospi(_:)](simd/sincospi(_:)-3fwbj.md)
- [tan(_:)](simd/tan(_:)-5czlf.md)
- [tanpi(_:)](simd/tanpi(_:)-9z76.md)