1 files changed, 0 insertions, 69 deletions
diff --git a/src/pkg/math/sincos.go b/src/pkg/math/sincos.go
deleted file mode 100644
index 718030319..000000000
--- a/src/pkg/math/sincos.go
+++ /dev/null
@@ -1,69 +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 math
-
-// Coefficients _sin[] and _cos[] are found in pkg/math/sin.go.
-
-// Sincos returns Sin(x), Cos(x).
-//
-// Special cases are:
-//	Sincos(±0) = ±0, 1
-//	Sincos(±Inf) = NaN, NaN
-//	Sincos(NaN) = NaN, NaN
-func Sincos(x float64) (sin, cos float64)
-
-func sincos(x float64) (sin, cos float64) {
-	const (
-		PI4A = 7.85398125648498535156E-1                             // 0x3fe921fb40000000, Pi/4 split into three parts
-		PI4B = 3.77489470793079817668E-8                             // 0x3e64442d00000000,
-		PI4C = 2.69515142907905952645E-15                            // 0x3ce8469898cc5170,
-		M4PI = 1.273239544735162542821171882678754627704620361328125 // 4/pi
-	)
-	// special cases
-	switch {
-	case x == 0:
-		return x, 1 // return ±0.0, 1.0
-	case IsNaN(x) || IsInf(x, 0):
-		return NaN(), NaN()
-	}
-
-	// make argument positive
-	sinSign, cosSign := false, false
-	if x < 0 {
-		x = -x
-		sinSign = true
-	}
-
-	j := int64(x * M4PI) // integer part of x/(Pi/4), as integer for tests on the phase angle
-	y := float64(j)      // integer part of x/(Pi/4), as float
-
-	if j&1 == 1 { // map zeros to origin
-		j += 1
-		y += 1
-	}
-	j &= 7     // octant modulo 2Pi radians (360 degrees)
-	if j > 3 { // reflect in x axis
-		j -= 4
-		sinSign, cosSign = !sinSign, !cosSign
-	}
-	if j > 1 {
-		cosSign = !cosSign
-	}
-
-	z := ((x - y*PI4A) - y*PI4B) - y*PI4C // Extended precision modular arithmetic
-	zz := z * z
-	cos = 1.0 - 0.5*zz + zz*zz*((((((_cos[0]*zz)+_cos[1])*zz+_cos[2])*zz+_cos[3])*zz+_cos[4])*zz+_cos[5])
-	sin = z + z*zz*((((((_sin[0]*zz)+_sin[1])*zz+_sin[2])*zz+_sin[3])*zz+_sin[4])*zz+_sin[5])
-	if j == 1 || j == 2 {
-		sin, cos = cos, sin
-	}
-	if cosSign {
-		cos = -cos
-	}
-	if sinSign {
-		sin = -sin
-	}
-	return
-}