cospi(_:) Returns the cosine of each element in a vector multiplied by pi. Declarationfunc cospi(_ x: simd_float4) -> simd_float4 See AlsoTrigonometric Functionsacos(_:)asin(_:)atan(_:)atan2(_:_:)cos(_:)sin(_:)sinpi(_:)sincos(_:)sincospi(_:)tan(_:)tanpi(_:)