rec-image1

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <csymbol cd="relation1">eq</csymbol>
    <apply>
      <csymbol cd="fns1">image</csymbol>
      <csymbol cd="transc1">sin</csymbol>
    </apply>
    <apply>
      <csymbol cd="interval1">interval_cc</csymbol>
      <cn>-1</cn>
      <cn>1</cn>
    </apply>
  </apply>
</math>

Author: MathML 2 Recommendation