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The math module defines [[Querying#Functions|XQuery Functions]] to perform mathematical operations, such as <code>pi</code>, <code>asin</code> and <code>acos</code>. All functions are preceded by the <code>math:</code> prefix. Some of the functions have also been specified in the [http://www.w3.org/TR/xpath-functions-1130/ Functions and Operators Specification] of the upcoming XQuery 3.0 Recommendation.
==math:pi==
