title: How to coerce AWK to evaluate string as math expression?
body: <p>Is there a way to evaluate a string as a math expression in awk?</p>
  
  <pre><code>balter@spectre3:~$ echo "sin(0.3) 0.3" | awk '{print $1,sin($2)}'
  sin(0.3) 0.29552
  </code></pre>
  
  <p>I would like to know a way to also have the first input evaluated to 0.29552.</p>