2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/129049We present evalauations and provide proofs of definite integrals involving the function x^p cos^n x. These formulae are generalizations of 3.761.11 and 3.822.1, among others, in the classical table of integrals by I. S. Gradshteyn and I. M. Ryzhik.13 pagesClassical Analysis and ODEs33B10text