cos(_:) Returns the cosine of each element in a vector. Declarationfunc cos(_ x: simd_double8) -> simd_double8 See AlsoTrigonometric Functionsacos(_:)asin(_:)atan(_:)atan2(_:_:)cospi(_:)sin(_:)sinpi(_:)sincos(_:)sincospi(_:)tan(_:)tanpi(_:)