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Source file src/math/cmplx/phase.go

  // 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"
  
  // Phase returns the phase (also called the argument) of x.
  // The returned value is in the range [-Pi, Pi].
  func Phase(x complex128) float64 { return math.Atan2(imag(x), real(x)) }
  

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