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<h1>Θ</h1>
<p class="subhead">Θ</p>
<p>
<a class="bodylink" href="../functions/intro/cos.xml">cos($θ as xs:double?) → xs:double?</a>
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<a class="bodylink" href="../functions/intro/sin.xml">sin($θ as xs:double?) → xs:double?</a>
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