trigonometry_3

sec(xy)2b / tan (x+y)

W3C sample	WIRIS
	$\frac{\sec (xy)2b}{\tan (x+y)}$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <divide/>
    <apply>
      <times/>
      <apply>
        <sec/>
        <apply>
          <times/>
          <ci>x</ci>
          <ci>y</ci>
        </apply>
      </apply>
      <apply>
        <times/>
        <cn>2</cn>
        <ci>b</ci>
      </apply>
    </apply>
    <apply>
      <tan/>
      <apply>
        <plus/>
        <cn>x</cn>
        <cn>y</cn>
      </apply>
    </apply>
  </apply>
</math>

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