1 files changed, 0 insertions, 65 deletions
diff --git a/src/lib/math/sin.go b/src/lib/math/sin.go
deleted file mode 100644
index 9fc69606c..000000000
--- a/src/lib/math/sin.go
+++ /dev/null
@@ -1,65 +0,0 @@
-// Copyright 2009 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
-
-import "math"
-
-func sinus(x float64, quad int) float64 {
-	// Coefficients are #3370 from Hart & Cheney (18.80D).
-	const
-	(
-		P0	=  .1357884097877375669092680e8;
-		P1	= -.4942908100902844161158627e7;
-		P2	=  .4401030535375266501944918e6;
-		P3	= -.1384727249982452873054457e5;
-		P4	=  .1459688406665768722226959e3;
-		Q0	=  .8644558652922534429915149e7;
-		Q1	=  .4081792252343299749395779e6;
-		Q2	=  .9463096101538208180571257e4;
-		Q3	=  .1326534908786136358911494e3;
-	)
-	if(x < 0) {
-		x = -x;
-		quad = quad+2;
-	}
-	x = x * (2/Pi);	/* underflow? */
-	var y float64;
-	if x > 32764 {
-		var e float64;
-		e, y = Modf(x);
-		e = e + float64(quad);
-		temp1, f := Modf(0.25*e);
-		quad = int(e - 4*f);
-	} else {
-		k := int32(x);
-		y = x - float64(k);
-		quad = (quad + int(k)) & 3;
-	}
-
-	if quad&1 != 0 {
-		y = 1-y;
-	}
-	if quad > 1 {
-		y = -y;
-	}
-
-	yy := y*y;
-	temp1 := ((((P4*yy+P3)*yy+P2)*yy+P1)*yy+P0)*y;
-	temp2 := ((((yy+Q3)*yy+Q2)*yy+Q1)*yy+Q0);
-	return temp1/temp2;
-}
-
-// Cos returns the cosine of x.
-func Cos(x float64) float64 {
-	if x < 0 {
-		x = -x;
-	}
-	return sinus(x, 1);
-}
-
-// Sin returns the sine of x.
-func Sin(x float64) float64 {
-	return sinus(x, 0);
-}