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X-Received: by 2002:ac8:5a07:: with SMTP id n7mr2495410qta.197.1637290321524; Thu, 18 Nov 2021 18:52:01 -0800 (PST) X-Received: by 2002:a05:6808:bc7:: with SMTP id o7mr1878886oik.172.1637290321308; Thu, 18 Nov 2021 18:52:01 -0800 (PST) Path: ...!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail Newsgroups: fr.sci.maths Date: Thu, 18 Nov 2021 18:52:01 -0800 (PST) Injection-Info: google-groups.googlegroups.com; posting-host=2a01:e0a:28a:37e0:287f:df6d:b6a3:5ecb; posting-account=yuKd5woAAAD-WShVY93IEyMInnt52G9u NNTP-Posting-Host: 2a01:e0a:28a:37e0:287f:df6d:b6a3:5ecb User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <1e25932f-21d1-4b35-8682-e6b32175963an@googlegroups.com> Subject: =?UTF-8?B?ZMOpdGVybWluYXRpb24gZGUocykgcm90YXRpb24ocykgYXhpYWxlKHMpIDNE?= From: marioski <warrencun-grp@yahoo.fr> Injection-Date: Fri, 19 Nov 2021 02:52:01 +0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Bytes: 1664 Lines: 14 bonjour, Bien que j'ai en t=C3=AAte les formules de changement de base,je n'arrive p= as =C3=A0 r=C3=A9soudre ce petit probl=C3=A8me peut-=C3=AAtre complexe: Je dispose dans l'espace de 2 rep=C3=A8res orthonorm=C3=A9s. le premier rep=C3=A8re R1 est (0,i,j,k) :celui de la base de l'espace o=C3= =B9 i,j,k sont des vecteurs unitaires et O le point origine du rep=C3=A8re. le second R2 est un autre rep=C3=A8re orthonorm=C3=A9(0,a,b,c) o=C3=B9 a,b,= c sont d'autres vecteurs unitaires Comment d=C3=A9terminer la rotation (angle+axe) permettant de transformer R= 1 en R2? merci de votre aide