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