<code><span class="hljs-meta">#<span class="hljs-meta-keyword">include</span> <span class="hljs-meta-string"><stdio.h></span></span>
<span class="hljs-meta">#<span class="hljs-meta-keyword">include</span> <span class="hljs-meta-string"><math.h></span></span>

<span class="hljs-function"><span class="hljs-keyword">int</span> <span class="hljs-title">main</span><span class="hljs-params">()</span>
</span>{
    <span class="hljs-keyword">double</span> x;
    <span class="hljs-keyword">double</span> result;

    x = <span class="hljs-number">2.3</span>;
    result = <span class="hljs-built_in">sin</span>(x);
    <span class="hljs-built_in">printf</span>(<span class="hljs-string">"sin(%.2lf) = %.2lf\n"</span>, x, result);

    x = <span class="hljs-number">-2.3</span>;
    result = <span class="hljs-built_in">sin</span>(x);
    <span class="hljs-built_in">printf</span>(<span class="hljs-string">"sin(%.2lf) = %.2lf\n"</span>, x, result);

    x = <span class="hljs-number">0</span>;
    result = <span class="hljs-built_in">sin</span>(x);
    <span class="hljs-built_in">printf</span>(<span class="hljs-string">"sin(%.2lf) = %.2lf\n"</span>, x, result);

    <span class="hljs-keyword">return</span> <span class="hljs-number">0</span>;
}</code>

Output

<samp>sin(2.30) = 0.75
sin(-2.30) = -0.75
sin(0.00) = 0.00</samp>