arccos2

arccos (5 pi)

W3C sample	WIRIS
	$\arccos (5\times \pi )$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <arccos/>
    <apply>
      <times/>
      <cn>5</cn>
      <cn>&#x003C0;</cn>
    </apply>
  </apply>
</math>

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