trigonometry_6

(sin x / cos x) ^ 2

W3C sample	WIRIS
	$x x 2$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <power/>
    <apply>
      <divide/>
      <apply>
        <sin/>
        <ci>x</ci>
      </apply>
      <apply>
        <cos/>
        <ci>x</ci>
      </apply>
    </apply>
    <cn>2</cn>
  </apply>
</math>

Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)