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wave

<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/31AAseYeqVY&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/31AAseYeqVY&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>
<blockquote>wave1;y=sin(theta+phase)</blockquote>