title: Matlab: Error using sin (squared)
body: <pre><code>theta = (0:0.01:2*pi)
  
  r = sin.^2.*(theta) + cos.^2.*(theta)
  </code></pre>
  
  <p>it returns me this error;</p>
  
  <blockquote>
    <p>Error using sin. Not enough input arguments.</p>
  </blockquote>
  
  <p>I am confused, what do i need to change?</p>