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      <h1>&#920;</h1>
      <p class="subhead">&#920;</p>
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         <a class="bodylink" href="../functions/intro/cos.xml">cos($&#952; as xs:double?) &#8594; xs:double?</a>
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         <a class="bodylink" href="../functions/intro/sin.xml">sin($&#952; as xs:double?) &#8594; xs:double?</a>
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