<PRE><B>Question 372333</B>
&lt;br&gt;&lt;font face=&quot;Tahoma&quot;&gt;Because of the nature of trigonometric functions, &lt;br&gt;

{{{sin(3pi)}}} is equal to {{{sin(pi)}}}&lt;br&gt;

There are many different ways to find the value for {{{sin(pi)}}} including:&lt;br&gt;

a calculator&lt;br&gt;

a trigonometric table&lt;br&gt;

a triangle&lt;br&gt;

{{{sin(pi)}}} is equal to zero.&lt;br&gt;

There is a LOT more to it, but there are many trigonometry resources around.&lt;br&gt;

And the more practice you get using the trig functions, the better.&lt;br&gt;

I hope this helps!&lt;br&gt;</PRE>