Refactor in accordance with pull request comments

Author: Rinbo

lib/node_modules/@stdlib/math/base/special/cosc/README.md

@@ -2,7 +2,7 @@
 
 @license Apache-2.0
 
-Copyright (c) 2018 The Stdlib Authors.
+Copyright (c) 2019 The Stdlib Authors.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -24,10 +24,16 @@ limitations under the License.
 
 <section class="intro">
 
-The derivative of the normalized [cardinal sine][sinc] function is defined as
+The derivative of the normalized [cardinal sine][sinc] is defined as
 
-` { cosc(x) = (cos( PI*x ) - sin( PI*x )/(PI*x)) / x } if x != 0, and 0 if x == 0 `
+<!-- <equation class="equation" label="eq:cosc" align="center" raw=""\operatorname{cosc}(x) = \begin{cases} \frac{\cos(\pi x)}{x} - \frac{\sin( \pi x)}{\pi x^2} & \textrm{if}\ x \neq 0 \\ 0 & \textrm{if}\ x = 0\end{cases}" alt="Derivative of the normalized cardinal sine."> -->
 
+<div class="equation" align="center" data-raw-text="\operatorname{cosc}(x) = \begin{cases} \frac{\cos(\pi x)}{x} - \frac{\sin( \pi x)}{\pi x^2} &amp; \textrm{if}\ x \neq 0 \\ 0 &amp; \textrm{if}\ x = 0\end{cases}" data-equation="eq:cosc">
+    <img src="docs/img/equation_cosc_function.svg" alt="Derivative of the normalized cardinal sine.">
+    <br>
+</div>
+
+<!-- </equation> -->
 
 <!-- </equation> -->
 
@@ -42,29 +48,25 @@ for any real number `x`.
 ## Usage
 
 ```javascript
-var cosc = require( '@stdlib/math/base/special/cosc' );
+var cosc = require("@stdlib/math/base/special/cosc");
 ```
 
 #### cosc( x )
 
 Computes the derivative of the normalized [cardinal sine][sinc] of a `number`.
 
 ```javascript
-var v = cosc( 0.5 );
-
-// Return ~-1.273
-
-var x = cosc( -1.2 );
-
-// Return ~0.544
-
-var y = cosc( 0.0 );
+var v = cosc(0.5);
+// returns ~-1.273
 
-// Return 0
+v = cosc(-1.2);
+// returns ~0.544
 
-var z = cosc( NaN );
+v = cosc(0.0);
+// returns 0
 
-// Return NaN
+v = cosc(NaN);
+// returns NaN
 ```
 
 </section>
@@ -78,14 +80,14 @@ var z = cosc( NaN );
 <!-- eslint no-undef: "error" -->
 
 ```javascript
-var linspace = require( '@stdlib/math/utils/linspace' );
-var cosc = require( '@stdlib/math/base/special/cosc' );
+var linspace = require("@stdlib/math/utils/linspace");
+var cosc = require("@stdlib/math/base/special/cosc");
 
-var x = linspace( -5.0, 5.0, 100 );
+var x = linspace(-5.0, 5.0, 100);
 var i;
 
-for ( i = 0; i < x.length; i++ ) {
-    console.log( cosc( x[ i ] ) );
+for (i = 0; i < x.length; i++) {
+    console.log(cosc(x[i]));
 }
 ```