⑩天掌 Teaching Plan on Advanced Mathematics o f(r)dx 一T (x)dx+xdr=t f(r)cos nude (x)cos ndx + xcos ndx 2 2 (cosm-1)=-2(-1)”-1 n 70 n tianjin polytechnic dmivendityTianjin Polytechnic University Teaching Plan on Advanced Mathematics    − a = f x nxdx n ( )cos 1    −  − +  = 0 0 cos 1 ( )cos 1 x nxdx x nxdx (cos 1) 2 2  −  = n n [( 1) 1] 2 2 − −  = n n    − a = f (x)dx 1 0    −  − +  = 0 0 1 ( ) 1 x dx xdx = 