2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/217422In this paper, we compare the waveforms from the post-Newtonian (PN) approach with the numerical simulations of generic black-hole binaries which have mass ratio $q\sim0.8$, arbitrarily oriented spins with magnitudes $S_1/m_1^2\sim0.6$ and $S_2/m_2^2\sim0.4$, and orbit 9 times from an initial orbital separation of $r\approx11M$ prior to merger. We observe a reasonably good agreement between the PN and numerical waveforms, with an overlap of over 98% for the first six cycles of the $(\ell=2,m=\pm2)$ mode and over 90% for the $(\ell=2,m=1)$ and $(\ell=3,m=3)$ modes.4 pages, 2 figures, prepared for the proceedings of the 18th workshop on general relativity and gravitation, Hiroshima, Japan, Nov.17 - Nov.21, 2008General Relativity and Quantum Cosmologytext