---
title: "atan2(_:_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/atan2(_:_:)-40z9"
---

# atan2(_:_:)

Returns the arctangent of each pair of corresponding elements in two vectors.

## Declaration

```swift
func atan2(_ y: simd_float3, _ x: simd_float3) -> simd_float3
```

## See Also

### Trigonometric Functions

- [acos(_:)](simd/acos(_:)-8bwml.md)
- [asin(_:)](simd/asin(_:)-5t22r.md)
- [atan(_:)](simd/atan(_:)-3otbw.md)
- [cos(_:)](simd/cos(_:)-2d0cu.md)
- [cospi(_:)](simd/cospi(_:)-1ceix.md)
- [sin(_:)](simd/sin(_:)-78r0i.md)
- [sinpi(_:)](simd/sinpi(_:)-99o27.md)
- [sincos(_:)](simd/sincos(_:)-3330.md)
- [sincospi(_:)](simd/sincospi(_:)-98kdl.md)
- [tan(_:)](simd/tan(_:)-yv9u.md)
- [tanpi(_:)](simd/tanpi(_:)-3lzzx.md)