<!--Copyright (C) 1988-2005 by the Institute of Global Environment and Society (IGES). See file COPYRIGHT for more information.--> <h2><b>sin</b></h2><p> <code>sin(<i>expr</i>)</code><p> Takes the sin of the provided expression. It is assumed the expression is in radiians. Result values are in the range -1 to 1. This function works on both gridded and station data. <H3>Usage Notes</H3><P> <H3>Examples</H3><P>