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The Ruby ''Math'' module provides the Ruby programmer with an extensive range of methods to performing mathematical tasks. In addition the ''Math'' module includes two commonly used mathematical constants.
== Ruby Math Constants ==
The Ruby ''Math'' module includes common math constants. A list of constants may be accessed using the ''constants'' method:
<pre>
Math.constants
=> ["E", "PI"]
</pre>
As we can see, as of tyhe current version of Ruby, only two constants are defined. We can access these using :: notation:
<pre>
Math::PI
=> 3.14159265358979
Math::E
=> 2.71828182845905
</pre>
== Ruby Math Methods ==
As mentioned previously, Ruby provides an extensive range of meth related methods. These are liosted and described in the following table.
<table border="1" cellspacing="0">
<tr style="background:#efefef;">
<tr><th>Method(s)<td> Description</th></tr>
<tr><td>Math.acos, Math.acos!<td> Arc cosine</td></tr>
<tr><td>Math.acosh, Math.acosh! <td>Hyperbolic arc cosine</td></tr>
<tr><td>Math.asin, Math.asin! <td>Arc sine</td></tr>
<tr><td>Math.asinh, Math.asinh <td>Hyperbolic arc sine</td></tr>
<tr><td>Math.atan, Math.atan!, Math.atan2, Math.atan2! <td>Arc tangent; atan takes an x argument; atan2 takes an x and a y argument</td></tr>
<tr><td>Math.atanh, Math.atanh! <td>Hyperbolic arc tangent</td></tr>
<tr><td>Math.cos, Math.cos! <td>Cosine</td></tr>
<tr><td>Math.cosh, Math.cosh <td>Hyperbolic cosine</td></tr>
<tr><td>Math.sin, Math.sin! <td>Sine</td></tr>
<tr><td>Math.erf <td>Error function</td></tr>
<tr><td>Match.erfc <td>Complementary error function</td></tr>
<tr><td>Math.exp, Math.exp! <td>Base x of Euler</td></tr>
<tr><td>Math.frexp <td>Normalized fraction and exponent</td></tr>
<tr><td>Math.hypot <td>Hypotenuse</td></tr>
<tr><td>Math.ldexp <td>Floating-point value corresponding to a given mantissa and exponent</td></tr>
<tr><td>Math.sinh, Math.sinh! <td>Hyperbolic sine</td></tr>
<tr><td>Math.sqrt, Math.sqrt! <td>Square root</td></tr>
<tr><td>Math.tan, Math.tan! <td>Tangent</td></tr>
<tr><td>Math.tanh, Math.tanh! <td>Hyperbolic tangent</td></tr>
</table>
