Imported Upstream version 1.4upstream/1.4

1 files changed, 0 insertions, 132 deletions

diff --git a/src/pkg/math/cmplx/sin.go b/src/pkg/math/cmplx/sin.go
deleted file mode 100644
index 2c57536ed..000000000
--- a/src/pkg/math/cmplx/sin.go
+++ /dev/null
@@ -1,132 +0,0 @@
-// 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"
-
-// The original C code, the long comment, and the constants
-// below are from http://netlib.sandia.gov/cephes/c9x-complex/clog.c.
-// The go code is a simplified version of the original C.
-//
-// Cephes Math Library Release 2.8:  June, 2000
-// Copyright 1984, 1987, 1989, 1992, 2000 by Stephen L. Moshier
-//
-// The readme file at http://netlib.sandia.gov/cephes/ says:
-//    Some software in this archive may be from the book _Methods and
-// Programs for Mathematical Functions_ (Prentice-Hall or Simon & Schuster
-// International, 1989) or from the Cephes Mathematical Library, a
-// commercial product. In either event, it is copyrighted by the author.
-// What you see here may be used freely but it comes with no support or
-// guarantee.
-//
-//   The two known misprints in the book are repaired here in the
-// source listings for the gamma function and the incomplete beta
-// integral.
-//
-//   Stephen L. Moshier
-//   moshier@na-net.ornl.gov
-
-// Complex circular sine
-//
-// DESCRIPTION:
-//
-// If
-//     z = x + iy,
-//
-// then
-//
-//     w = sin x  cosh y  +  i cos x sinh y.
-//
-// csin(z) = -i csinh(iz).
-//
-// ACCURACY:
-//
-//                      Relative error:
-// arithmetic   domain     # trials      peak         rms
-//    DEC       -10,+10      8400       5.3e-17     1.3e-17
-//    IEEE      -10,+10     30000       3.8e-16     1.0e-16
-// Also tested by csin(casin(z)) = z.
-
-// Sin returns the sine of x.
-func Sin(x complex128) complex128 {
-	s, c := math.Sincos(real(x))
-	sh, ch := sinhcosh(imag(x))
-	return complex(s*ch, c*sh)
-}
-
-// Complex hyperbolic sine
-//
-// DESCRIPTION:
-//
-// csinh z = (cexp(z) - cexp(-z))/2
-//         = sinh x * cos y  +  i cosh x * sin y .
-//
-// ACCURACY:
-//
-//                      Relative error:
-// arithmetic   domain     # trials      peak         rms
-//    IEEE      -10,+10     30000       3.1e-16     8.2e-17
-
-// Sinh returns the hyperbolic sine of x.
-func Sinh(x complex128) complex128 {
-	s, c := math.Sincos(imag(x))
-	sh, ch := sinhcosh(real(x))
-	return complex(c*sh, s*ch)
-}
-
-// Complex circular cosine
-//
-// DESCRIPTION:
-//
-// If
-//     z = x + iy,
-//
-// then
-//
-//     w = cos x  cosh y  -  i sin x sinh y.
-//
-// ACCURACY:
-//
-//                      Relative error:
-// arithmetic   domain     # trials      peak         rms
-//    DEC       -10,+10      8400       4.5e-17     1.3e-17
-//    IEEE      -10,+10     30000       3.8e-16     1.0e-16
-
-// Cos returns the cosine of x.
-func Cos(x complex128) complex128 {
-	s, c := math.Sincos(real(x))
-	sh, ch := sinhcosh(imag(x))
-	return complex(c*ch, -s*sh)
-}
-
-// Complex hyperbolic cosine
-//
-// DESCRIPTION:
-//
-// ccosh(z) = cosh x  cos y + i sinh x sin y .
-//
-// ACCURACY:
-//
-//                      Relative error:
-// arithmetic   domain     # trials      peak         rms
-//    IEEE      -10,+10     30000       2.9e-16     8.1e-17
-
-// Cosh returns the hyperbolic cosine of x.
-func Cosh(x complex128) complex128 {
-	s, c := math.Sincos(imag(x))
-	sh, ch := sinhcosh(real(x))
-	return complex(c*ch, s*sh)
-}
-
-// calculate sinh and cosh
-func sinhcosh(x float64) (sh, ch float64) {
-	if math.Abs(x) <= 0.5 {
-		return math.Sinh(x), math.Cosh(x)
-	}
-	e := math.Exp(x)
-	ei := 0.5 / e
-	e *= 0.5
-	return e - ei, e + ei
-}