// Copyright 2010 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package cmplx import "math" // Rect returns the complex number x with polar coordinates r, θ. func Rect(r, θ float64) complex128 { s, c := math.Sincos(θ) return complex(r*c, r*s) }