Re: Integration - another Integer as a result

*To*: mathgroup at smc.vnet.net*Subject*: [mg93821] Re: Integration - another Integer as a result*From*: matt <eep1mp at surrey.ac.uk>*Date*: Wed, 26 Nov 2008 05:16:42 -0500 (EST)

Hi Mike, I guess when you say integer you mean integral. Your problem comes from the fact that the mathematica function to calculate the sin function is Sin[]. Built in mathematica functions begin with a capital letter and I suspect that you typed a lower case 's'. Integrate[2 x Sin[(n Pi x)/L] Sin[(m Pi x)/L],x ] Should achieve the result you want. Matt