1. The problem sttatement, all variables and given/known data i dont understand the moment FDC(sin18.43)(9) , I think it's wrong.. http://imgur.com/a/qPdqf 2. Relevant equations 3. The attempt at a solution I think it should be FDC(cos18.43)(3), am i right? the r is the perpedicular distance from D to force FDC, i have circled it.... Or I'm wrong? FDCsin18.43)(9) represent other moment?