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<?php/** This work is hereby released into the Public Domain.* To view a copy of the public domain dedication,* visit http://creativecommons.org/licenses/publicdomain/ or send a letter to* Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.**/require_once "../MathPlot.class.php";$graph = new Graph(300, 300);$plot = new MathPlot(-3, 3, 3, -3);$plot->setInterval(0.1);$function = new MathFunction('cos');$plot->add($function);$graph->add($plot);$graph->draw();?>