From 21d0cc814ed090f9619ff1851970ece48a350f5d Mon Sep 17 00:00:00 2001
From: royels <docmentz@gmail.com>
Date: Fri, 20 May 2016 12:48:23 -0400
Subject: [PATCH] Changed the exponent function for rounding

---
 lib/functions/acos.js          | 10 ++++++----
 lib/functions/asin.js          |  7 +++++--
 lib/functions/atan.js          |  7 +++++--
 lib/functions/convert-angle.js | 10 ++++++++++
 test/cases/bifs.math.css       |  6 ++++++
 test/cases/bifs.math.styl      |  6 ++++++
 6 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/lib/functions/acos.js b/lib/functions/acos.js
index c0bf0dd10..f4479db97 100644
--- a/lib/functions/acos.js
+++ b/lib/functions/acos.js
@@ -4,15 +4,17 @@ var utils = require('../utils')
 	, asin    = require('./asin');
 
 /**
- * Return the tangent of the given `angle`.
+ * Return the arccosine of the given `value`.
  *
- * @param {Unit} angle
+ * @param {Double} trigValue
+ * @param {Unit} output 
  * @return {Unit}
  * @api public
  */
-
 module.exports = function acos(trigValue, output) {
 	var output = typeof output !== 'undefined' ? output : 'deg';
-	var convertedValue = convert(Math.PI / 2, output) - asin(trigValue, output);
+	var convertedValue = convert(Math.PI / 2, output) - asin(trigValue, output).val;
+	var m = Math.pow(10, 9);
+	convertedValue = Math.round(convertedValue * m) / m;
   return new nodes.Unit(convertedValue, output);
 };
diff --git a/lib/functions/asin.js b/lib/functions/asin.js
index 9db6f9237..5cfbcff78 100644
--- a/lib/functions/asin.js
+++ b/lib/functions/asin.js
@@ -3,16 +3,19 @@ var utils = require('../utils')
 	, convert = require('./convert-angle');
 
 /**
- * Return the tangent of the given `angle`.
+ * Return the arcsine of the given `value`.
  *
- * @param {Unit} angle
+ * @param {Double} trigValue
+ * @param {Unit} output 
  * @return {Unit}
  * @api public
  */
 
 module.exports = function atan(trigValue, output) {
 	var output = typeof output !== 'undefined' ? output : 'deg';
+  var m = Math.pow(10, 9);
 	var value = Math.asin(trigValue) ;
 	var convertedValue = convert(value, output);
+	convertedValue = Math.round(convertedValue * m) / m;
   return new nodes.Unit(convertedValue, output);
 };
diff --git a/lib/functions/atan.js b/lib/functions/atan.js
index 932006975..90501650d 100644
--- a/lib/functions/atan.js
+++ b/lib/functions/atan.js
@@ -3,9 +3,10 @@ var utils = require('../utils')
 	, convert = require('./convert-angle');
 
 /**
- * Return the tangent of the given `angle`.
+ * Return the arctangent of the given `value`.
  *
- * @param {Unit} angle
+ * @param {Double} trigValue
+ * @param {Unit} output 
  * @return {Unit}
  * @api public
  */
@@ -13,6 +14,8 @@ var utils = require('../utils')
 module.exports = function atan(trigValue, output) {
 	var output = typeof output !== 'undefined' ? output : 'deg';
 	var value = Math.atan(trigValue) ;
+	var m = Math.pow(10, 9);
 	var convertedValue = convert(value, output);
+	convertedValue = Math.round(convertedValue * m) / m;
   return new nodes.Unit(convertedValue, output);
 };
diff --git a/lib/functions/convert-angle.js b/lib/functions/convert-angle.js
index 2f73e3fb5..d0832f26e 100644
--- a/lib/functions/convert-angle.js
+++ b/lib/functions/convert-angle.js
@@ -1,3 +1,13 @@
+
+/**
+ * Convert given value's base into the parameter unitName
+ *
+ * @param {Double} value
+ * @param {String} unitName
+ * @return {Double}
+ * @api private
+ */
+
 module.exports = function convertAngle(value, unitName) {
 	var factors = {
 		"rad" : 1,
diff --git a/test/cases/bifs.math.css b/test/cases/bifs.math.css
index e12723738..d56444912 100644
--- a/test/cases/bifs.math.css
+++ b/test/cases/bifs.math.css
@@ -70,3 +70,9 @@
 .math_atan {
   test1: 45deg;
 }
+.math_asin {
+  test1: 44.999999985deg;
+}
+.math_acos {
+  test1: 45.000000015deg;
+}
diff --git a/test/cases/bifs.math.styl b/test/cases/bifs.math.styl
index c04e5e23c..aaba9310f 100644
--- a/test/cases/bifs.math.styl
+++ b/test/cases/bifs.math.styl
@@ -65,3 +65,9 @@
 
 .math_atan
   test1: atan(tan(45deg)) 
+
+.math_asin
+  test1: asin(sin(45deg)) 
+
+.math_acos
+  test1: acos(cos(45deg))