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-rw-r--r--src/math/cmplx/polar.go12
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diff --git a/src/math/cmplx/polar.go b/src/math/cmplx/polar.go
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+// 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
+
+// Polar returns the absolute value r and phase θ of x,
+// such that x = r * e**θi.
+// The phase is in the range [-Pi, Pi].
+func Polar(x complex128) (r, θ float64) {
+ return Abs(x), Phase(x)
+}